normal - Definitions from Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

nor·mal

Audio Help [nawr-muh

l] Pronunciation Key

–adjective

1.	conforming to the standard or the common type; usual; not abnormal; regular; natural.

2.	serving to establish a standard.

Psychology.

a.	approximately average in any psychological trait, as intelligence, personality, or emotional adjustment.

b.	free from any mental disorder; sane.

Biology, Medicine/Medical.

a.	free from any infection or other form of disease or malformation, or from experimental therapy or manipulation.

b.	of natural occurrence.

Mathematics.

a.	being at right angles, as a line; perpendicular.

b.	of the nature of or pertaining to a mathematical normal.

c.	(of an orthogonal system of real functions) defined so that the integral of the square of the absolute value of any function is 1.

d.	(of a topological space) having the property that corresponding to every pair of disjoint closed sets are two disjoint open sets, each containing one of the closed sets.

e.	(of a subgroup) having the property that the same set of elements results when all the elements of the subgroup are operated on consistently on the left and consistently on the right by any element of the group; invariant.

Chemistry.

a.	(of a solution) containing one equivalent weight of the constituent in question in one liter of solution.

b.	pertaining to an aliphatic hydrocarbon having a straight unbranched carbon chain, each carbon atom of which is joined to no more than two other carbon atoms.

c.	of or pertaining to a neutral salt in which any replaceable hydroxyl groups or hydrogen atoms have been replaced by other groups or atoms, as sodium sulfate, Na₂SO₄.

–noun

7.	the average or mean: Production may fall below normal.

8.	the standard or type.

Mathematics.

a.	a perpendicular line or plane, esp. one perpendicular to a tangent line of a curve, or a tangent plane of a surface, at the point of contact.

b.	the portion of this perpendicular line included between its point of contact with the curve and the x-axis.

[Origin: 1520–30; < L normālis made according to a carpenter's square, equiv. to norm(a) (see norm) + -ālis -al¹

]

—Related forms

nor·mal·i·ty, nor·mal·ness, noun

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
normal

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

Nor·mal

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l] Pronunciation Key

–noun

a city in central Illinois. 35,672.

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

American Heritage Dictionary - Cite This Source - Share This

nor·mal Audio Help (nôr'məl) Pronunciation Key
adj.

Conforming with, adhering to, or constituting a norm, standard, pattern, level, or type; typical: normal room temperature; one's normal weight; normal diplomatic relations.
Biology Functioning or occurring in a natural way; lacking observable abnormalities or deficiencies.
Abbr. n or N Chemistry
1. Designating a solution having one gram equivalent weight of solute per liter of solution.
2. Designating an aliphatic hydrocarbon having a straight and unbranched chain of carbon atoms.
3. Being at right angles; perpendicular.
4. Perpendicular to the direction of a tangent line to a curve or a tangent plane to a surface.
5. Relating to or characterized by average intelligence or development.
6. Free from mental illness; sane.
Mathematics
1. Being at right angles; perpendicular.
2. Perpendicular to the direction of a tangent line to a curve or a tangent plane to a surface.
3. Relating to or characterized by average intelligence or development.
4. Free from mental illness; sane.
1. Relating to or characterized by average intelligence or development.
2. Free from mental illness; sane.

Something normal; the standard: scored close to the normal.
The usual or expected state, form, amount, or degree.
1. Correspondence to a norm.
2. An average.
Mathematics A perpendicular, especially a perpendicular to a line tangent to a plane curve or to a plane tangent to a space curve.

[Middle English, from Late Latin normālis, from Latin, made according to the square, from norma, carpenter's square; see gnō- in Indo-European roots.]

nor'mal·ly adv.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

American Heritage Dictionary - Cite This Source - Share This

Nor·mal Audio Help (nôr'məl) Pronunciation Key
A town of central Illinois north-northeast of Bloomington. It is the seat of Illinois State University (founded 1857). Population: 49,900.

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Online Etymology Dictionary - Cite This Source - Share This
normal

1650, "standing at a right angle," from L.L. normalis "in conformity with rule, normal," from L. normalis "made according to a carpenter's square," from norma "rule, pattern," lit. "carpenter's square" (see norm). Meaning "conformingt to common standards, usual" is from 1828. Normalcy is first attested 1857, originally as a mathematical term; normality is first attested 1849. Normal school (1834) is from Fr. école normale (1794), a republican foundation.

WordNet - Cite This Source - Share This

normal
adjective
1.	conforming with or constituting a norm or standard or level or type or social norm; not abnormal; "serve wine at normal room temperature"; "normal diplomatic relations"; "normal working hours"; "normal word order"; "normal curiosity"; "the normal course of events" [ant: abnormal]
2.	in accordance with scientific laws [ant: paranormal]
3.	being approximately average or within certain limits in e.g. intelligence and development; "a perfectly normal child"; "of normal intelligence"; "the most normal person I've ever met" [ant: abnormal]
4.	forming a right angle
noun
1.	something regarded as a normative example; "the convention of not naming the main character"; "violence is the rule not the exception"; "his formula for impressing visitors" [syn: convention]

Kernerman English Multilingual Dictionary - Cite This Source - Share This
normal [ˈnoːməl] adjective

usual; without any special characteristics or circumstances
Example: How much work do you do on a normal day?; normal people; His behaviour is not normal.

Arabic:	عادي، طَبيعي
Chinese (Simplified):	正常的
Chinese (Traditional):	正常的
Czech:	normální
Danish:	normal
Dutch:	normaal
Estonian:	normaalne
Finnish:	normaali
French:	normal
German:	gewöhnlich
Greek:	κανονικός, φυσιολογικός
Hungarian:	normális, rendes
Icelandic:	normal; eðlilegur, venjulegur
Indonesian:	normal
Italian:	normale

Japanese:	普通の
Korean:	정상적인, 통상의
Latvian:	normāls, parasts
Lithuanian:	normalus, įprastas
Norwegian:	normal(-)
Polish:	normalny
Portuguese (Brazil):	normal
Portuguese (Portugal):	normal
Romanian:	normal, obişnuit
Russian:	обыкновенный; обычный
Slovak:	normálny
Slovenian:	navaden
Spanish:	normal
Swedish:	normal, vanlig
Turkish:	normal

See also: normally

U.S. Gazetteer - Cite This Source - Share This

Normal, IL (town, FIPS 53234) Location: 40.51737 N, 88.99941 W
Population (1990): 40023 (12300 housing units)
Area: 31.5 sq km (land), 0.0 sq km (water)
Zip code(s): 61761

U.S. Gazetteer, U.S. Census Bureau

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Normal

Ab*nor"mous\, a. [L. abnormis; ab + norma rule. See Normal.] Abnormal; irregular. --Hallam.

A character of a more abnormous cast than his equally suspected coadjutor. --State Trials.

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Normal

A*nor"mal\, a. [F. anormal. See Abnormal, Normal.] Not according to rule; abnormal. [Obs.]

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