Breadcrumb Home > Dictionary > Index D drillmaster: Meaning and Definition of Find definitions for: drill•mas•ter Pronunciation: (dril'mas"tur, -mä"stur), [key] — n. a person who trains others in something, esp. routinely or mechanically. a person who instructs in marching drill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. drilling mud drill pipe ✖ Related Content Daily Word Quiz: quadrumanous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language