/ Dictionary / Index S Sidney: Meaning and Definition of Find definitions for: Sid•ney Pronunciation: (sid'nē), [key] — n. 1554–86, English poet, writer, statesman, and soldier. a city in N Ohio. 17,657. a male or female given name: a family name taken from a French placename, Saint Denis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sidney (Thesaurus) sidle Sidon Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language