/ Dictionary / Index E East Sider: Meaning and Definition of Find definitions for: East' Sid'er Pronunciation: (sī'dur), [key] a native or resident of the East Side of Manhattan, in New York City. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. East Side east-southeast Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language