/ Dictionary / Index A alti-: Meaning and Definition of Find definitions for: alti- Pronunciation: [key] a combining form with the meaning “high,” used in the formation of compound words: altigram, altitude. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. although altigraph Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language