/ Dictionary / Index C control tower: Meaning and Definition of Find definitions for: control' tow"er Pronunciation: [key] a glass-enclosed, elevated structure for the visual observation and control of the air and ground traffic at an airport. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. control survey control unit Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language