/ Dictionary / Index M mission control: Meaning and Definition of Find definitions for: mis'sion control" Pronunciation: [key] a command center for the control, monitoring, and support of activities connected with manned space flight. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Missionary Ridge missionize Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language