a particular or indefinite amount of anything: a small quantity of milk; the ocean's vast quantity of fish.
2.
an exact or specified amount or measure: Mix the ingredients in the quantities called for.
3.
a considerable or great amount: to extract ore in quantity.
4.
Mathematics.
a.
the property of magnitude involving comparability with other magnitudes.
b.
something having magnitude, or size, extent, amount, or the like.
c.
magnitude, size, volume, area, or length.
5.
Music. the length or duration of a note.
6.
Logic. the character of a proposition as singular, universal, particular, or mixed, according to the presence or absence of certain kinds of quantifiers.
7.
that amount, degree, etc., in terms of which another is greater or lesser.
8.
Prosody,Phonetics. the relative duration or length of a sound or a syllable, with respect to the time spent in pronouncing it; length.
9.
Law. the nature of an estate as affected by its duration in time.
[Origin: 1250–1300; ME quantite < OF < L quantitās, equiv. to quant(us) how much + -itās-ity]
c.1325, from O.Fr. quantite (Fr. quantité), from L. quantitatem (nom. quantitas, coined as a loan-translation of Gk. posotes) "relative greatness or extent," from quantus "how much," from quam "how, how much."
the size, weight, number etc of something, especially a large size etc Example: What quantity of paper do you need?; I buy these goods in quantity; a small quantity of cement; large quantities of tinned food
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Something, such as a number or symbol that represents a number, on which a mathematical operation is performed.
Im*ag"i*na*ry\, a. [L. imaginarius: cf. F. imaginaire.] Existing only in imagination or fancy; not real; fancied; visionary; ideal. Wilt thou add to all the griefs I suffer Imaginary ills and fancied tortures? --Addison. Imaginary calculus See under Calculus. Imaginary expression or quantity (Alg.), an algebraic expression which involves the impossible operation of taking the square root of a negative quantity; as, [root]-9, a + b [root]-1. Imaginary points, lines, surfaces, etc. (Geom.), points, lines, surfaces, etc., imagined to exist, although by reason of certain changes of a figure they have in fact ceased to have a real existence. Syn: Ideal; fanciful; chimerical; visionary; fancied; unreal; illusive.
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