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quan·ti·ty (kwŏntĭ-tē)
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n. pl. quan·ti·ties
1.
a. A specified or indefinite number or amount: shipped a large quantity of books; sells quantities of paper to publishers.
b. A considerable amount or number: sells drugs wholesale and in quantity.
c. An exact amount or number: the quantity of material recycled in a month.
2. The measurable or countable property or aspect of things: Arithmetic deals with quantity.
3. Mathematics Something that serves as the object of an operation.
4.
a. Linguistics The relative amount of time needed to pronounce a vowel, consonant, or syllable.
b. The duration of a syllable in quantitative verse.
5. Logic The exact character of a proposition in reference to its universality, singularity, or particularity.

[Middle English quantite, from Old French, from Latin quantitās, quantitāt-, from quantus, how great; see kwo- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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