/ Dictionary / Index T transit instrument: Meaning and Definition of Find definitions for: tran'sit in"strument Pronunciation: [key] See meridian circle. transit (def. 6a). Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. transit circle transition Related Content Daily Word Quiz: wizened Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language