/ Dictionary / Index J Jeffrey pine: Meaning and Definition of Find definitions for: Jef'frey pine' Pronunciation: [key] a conifer, Pinus jeffreyi, of high mountains in the western U.S., having long needles, large cones, and aromatic bark. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jeffrey Jeffreys Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language