Pronoun Definition

prōnoun

pronouns

noun

The part of speech that substitutes for nouns or noun phrases and designates persons or things asked for, previously specified, or understood from the context.

American Heritage

Any of a small class of relationship or signal words that assume the functions of nouns within clauses or phrases while referring to other locutions within the sentence or in other sentences: I, you, them, it, ours, who, which, myself, anybody, etc. are pronouns.

Webster's New World

Other Word Forms of Pronoun

Noun

Singular:

pronoun

Plural:

pronouns

Origin of Pronoun

Late Middle English pronoun, pronoune partial translation of Latin prōnōmen (translation of Greek antōnumiā interchange of names, pronoun) prō- pro- nōmen name, noun

From American Heritage Dictionary of the English Language, 5th Edition
pro- +"Ž noun, modeled on Middle French pronom, from Latin pronomen, itself a calque of Ancient Greek ἀντωνυμία (antōnumia).

From Wiktionary