/ Dictionary / Index J jack plane: Meaning and Definition of Find definitions for: jack' plane" Pronunciation: [key] — Carpentry. Carpentry. a plane for rough surfacing. See illus. under. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jack pine jack post Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language