/ Dictionary / Index D demi-cannon: Meaning and Definition of Find definitions for: dem•i-can•non Pronunciation: (dem"ē kan'un), [key] — n. a large cannon of the 16th century, having a bore of about 6 in. (17 cm) and firing a shot of from 30 to 36 lb. (14 to 16 kg). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. demibastion demicanton 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