/ Dictionary / Index T trunnel: Meaning and Definition of Find definitions for: trun•nel Pronunciation: (trun'l), [key] — n. treenail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trunnel (Thesaurus) trunk piston trunnion Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language