/ Dictionary / Index M masterly: Meaning and Definition of Find definitions for: mas•ter•ly Pronunciation: (mas'tur-lē, mä'stur-), [key] — adj. like or befitting a master, as in skill or art; worthy of a master; very skillful: a masterly presentation of the budget. —adv. in a masterly manner. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: masterly (Thesaurus) master key master mason Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language