/ Dictionary / Index R rowlock: Meaning and Definition of Find definitions for: row•lock Pronunciation: (rō'lok" for 3 also Naut. rol'&schwak, rul'-), [key] — n. one of several concentric rings of masonry forming an arch. a brick laid on edge, esp. as a header. Cf.(def. 7). oarlock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rowlock (Thesaurus) Rowlandson row vector Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language