/ Dictionary / Index C can buoy: Meaning and Definition of Find definitions for: can' bu"oy Pronunciation: [key] a cylindrical, unlighted buoy used as a channel marker. See illus. underCf. nun buoy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Canberra Canby Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language