/ Dictionary / Index A AIP: Meaning and Definition of Find definitions for: AIP Pronunciation: [key] American Institute of Physics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aiora air Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language