any of the major appearances or aspects in which a thing of varying modes or conditions manifests itself to the eye or mind.
2.
a stage in a process of change or development: Each phase of life brings its own joys.
3.
a side, aspect, or point of view: This is only one phase of the question.
4.
a state of synchronous operation: to put two mechanisms in phase.
5.
Astronomy.
a.
the particular appearance presented by the moon or a planet at a given time.
b.
one of the recurring appearances or states of the moon or a planet in respect to the form, or the absence, of its illuminated disk: the phases of the moon.
Chemistry. a mechanically separate, homogeneous part of a heterogeneous system: the solid, liquid, and gaseous phases of a system.
8.
Physics. a particular stage or point of advancement in a cycle; the fractional part of the period through which the time has advanced, measured from some arbitrary origin often expressed as an angle (phase angle), the entire period being taken as 360°.
–verb (used with object)
9.
to schedule or order so as to be available when or as needed.
10.
to put in phase; synchronize: to phase one mechanism with another.
—Verb phrases
11.
phase down, to reduce by gradual stages.
12.
phase in, to put or come into use gradually; incorporate by degrees: to phase in new machinery.
13.
phase out, to bring or come to an end gradually; ease out of service: to phase out obsolescent machinery.
[Origin: 1805–15; (n.) back formation from phases, pl. of phasis]
A distinct stage of development: "The American occupation of Japan fell into three successive phases"(Edwin O. Reischauer).
A temporary manner, attitude, or pattern of behavior: just a passing phase.
An aspect; a part: every phase of the operation.
Astronomy One of the cyclically recurring apparent forms of the moon or a planet.
Physics
A particular stage in a periodic process or phenomenon.
The fraction of a complete cycle elapsed as measured from a specified reference point and often expressed as an angle.
Any of the forms or states, solid, liquid, gas, or plasma, in which matter can exist, depending on temperature and pressure.
A discrete homogeneous part of a material system that is mechanically separable from the rest, as is ice from water.
Chemistry
Any of the forms or states, solid, liquid, gas, or plasma, in which matter can exist, depending on temperature and pressure.
A discrete homogeneous part of a material system that is mechanically separable from the rest, as is ice from water.
Biology A characteristic form, appearance, or stage of development that occurs in a cycle or that distinguishes some individuals of a group: the white color phase of a weasel; the swarming phase of locusts.
tr.v.
phased, phas·ing, phas·es
To plan or carry out systematically by phases.
To set or regulate so as to be synchronized.
Phrasal Verb(s): phase in
To introduce, one stage at a time.
phase out
To bring or come to an end, one stage at a time.
Idiom(s):
in phase
In a correlated or synchronized way.
Idiom(s):
out of phase
In an unsynchronized or uncorrelated way.
[Back-formation from New Latin phasēs, phases of the moon, from Greek phaseis, pl. of phasis, appearance, from phainein, to show; see bhā-1 in Indo-European roots.]
pha'sic (fā'zĭk) adj.
Synonyms: These nouns refer to a particular or possible way of viewing something, such as an object or a process: Phase refers to a stage or period of change or development: "A phase of my life was closing tonight, a new one opening tomorrow" (Charlotte Brontë).
Aspect is the way something appears at a specific vantage point: considered all aspects of the project.
A facet is one of numerous aspects: studying the many facets of the intricate problem. Angle suggests a limitation of perspective, frequently with emphasis on the observer's own point of view: the reporter's angle on the story. Side refers to something having two or more parts or aspects: "Much might be said on both sides" (Joseph Addison).
1812, "phase of the moon," back-formed as a sing. from Mod.L. phases, pl. of phasis, from Gk. phasis "appearance" (of a star), "phase" (of the moon), from stem of phainein "to show, to make appear" (see phantasm). L. sing. phasis was used in Eng. from 1660. Non-lunar application is first attested 1841. Meaning "temporary difficult period" (especially of adolescents) is attested from 1913. The verb meaning "to synchronize" is from 1938, from the noun.
any distinct time period in a sequence of events; "we are in a transitional stage in which many former ideas must be revised or rejected"
2.
(physical chemistry) a distinct state of matter in a system; matter that is identical in chemical composition and physical state and separated from other material by the phase boundary; "the reaction occurs in the liquid phase of the system"
3.
a particular point in the time of a cycle; measured from some arbitrary zero and expressed as an angle
4.
(astronomy) the particular appearance of a body's state of illumination (especially one of the recurring shapes of the part of Earth's moon that is illuminated by the sun); "the full phase of the moon"
verb
1.
arrange in phases or stages; "phase a withdrawal"
2.
adjust so as to be in a synchronized condition; "he phased the intake with the output of the machine"
Any of the forms, recurring in cycles, in which the Moon or a planet appears in the sky.
One of a set of possible homogenous, discrete states of a physical system. States of matter such as solid and liquid are examples of phases, as are different crystal lattice structures in metals such as iron. See also phase transition, state of matter.
A measure of how far some cyclic behavior, such as wave motion, has proceeded through its cycle, measured in degrees or radians. At the beginning of the phase, its value is zero; at one quarter of its cycle, its phase is 90 degrees (π/2 radians); halfway through the cycle its value is 180 degrees (π radians), and so on. ◇ The phase angle between two waves is a measure of their difference in phase. Two waves of the same frequency that are perfectly in phase have phase angle zero; if one wave is ahead of the other by a quarter cycle, its phase angle 90 degrees (π/2 radians); waves that are perfectly out of phase have phase angle 180 degrees (π radians), and so on. See more at wave.
phase 1. The offset of one's waking-sleeping schedule with respect to the standard 24-hour cycle; a useful concept among people who often work at night and/or according to no fixed schedule. It is not uncommon to change one's phase by as much as 6 hours per day on a regular basis. "What's your phase?" "I've been getting in about 8 P.M. lately, but I'm going to wrap around to the day schedule by Friday." A person who is roughly 12 hours out of phase is sometimes said to be in "night mode". (The term "day mode" is also (but less frequently) used, meaning you're working 9 to 5 (or, more likely, 10 to 6).) The act of altering one's cycle is called "changing phase"; "phase shifting" has also been recently reported from Caltech. 2. "change phase the hard way": To stay awake for a very long time in order to get into a different phase. 3. "change phase the easy way": To stay asleep, etc. However, some claim that either staying awake longer or sleeping longer is easy, and that it is *shortening* your day or night that is really hard (see wrap around). The "jet lag" that afflicts travelers who cross many time-zone boundaries may be attributed to two distinct causes: the strain of travel per se, and the strain of changing phase. Hackers who suddenly find that they must change phase drastically in a short period of time, particularly the hard way, experience something very like jet lag without travelling.
Em"pha*sis\, n.; pl. Emphases. [L., fr. Gr. ? significance, force of expression, fr. ? to show in, indicate; ? in + ? to show. See In, and Phase.]1. (Rhet.) A particular stress of utterance, or force of voice, given in reading and speaking to one or more words whose signification the speaker intends to impress specially upon his audience. The province of emphasis is so much more important than accent, that the customary seat of the latter is changed, when the claims of emphasis require it. --E. Porter. 2. A peculiar impressiveness of expression or weight of thought; vivid representation, enforcing assent; as, to dwell on a subject with great emphasis. External objects stand before us . . . in all the life and emphasis of extension, figure, and color. --Sir W. Hamilton.
Phase\, n. 1. (Phys. Chem.) A homogenous, physically distinct portion of matter in a system not homogeneous; as, the three phases, ice, water, and aqueous vapor. A phase may be either a single chemical substance or a mixture, as of gases. 2. (Zo["o]l.) In certain birds and mammals, one of two or more color variations characteristic of the species, but independent of the ordinary seasonal and sexual differences, and often also of age. Some of the herons which appear in white and colored phases, and certain squirrels which are sometimes uniformly blackish instead of the usual coloration, furnish examples. Color phases occur also in other animals, notably in butterflies. 3. (Elec.) The relation at any instant of a periodically varying electric magnitude, as electro-motive force, a current, etc., to its initial value as expressed in factorial parts of the complete cycle. It is usually expressed in angular measure, the cycle beb four right angles, or 360[deg]. Such periodic variations are generally well represented by sine curves; and phase relations are shown by the relative positions of the crests and hollows of such curves. Magnitudes which have the same phase are said to be in phase.
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