/ Dictionary / Index O outstroke: Meaning and Definition of Find definitions for: out•stroke Pronunciation: (out'strōk"), [key] — n. a stroke in an outward direction. (in an engine) the stroke during which the piston rod moves outward from the cylinder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: outstroke (Thesaurus) outstrip outsung Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language