/ Dictionary / Index M milk sugar: Meaning and Definition of Find definitions for: milk' sug"ar Pronunciation: [key] lactose. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. milksop milk thistle Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language