/ Dictionary / Index F fanweed: Meaning and Definition of Find definitions for: fan•weed Pronunciation: (fan'wēd"), [key] — n. the pennycress, Thlaspi arvense. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fanweed (Thesaurus) fan vaulting fan window Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language