/ Dictionary / Index F FET: Meaning and Definition of Find definitions for: FET Pronunciation: [key] federal estate tax. field-effect transistor. F.E.T. Pronunciation: [key] Federal Excise Tax. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fet (Thesaurus) festuca feta Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language