/ Dictionary / Index Y yardarm: Meaning and Definition of Find definitions for: yard•arm Pronunciation: (yärd'ärm"), [key] — n. Naut. either of the outer portions of the yard of a square sail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yardarm (Thesaurus) yardang yardbird 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