/ Dictionary / Index A Allen screw: Meaning and Definition of Find definitions for: Al'len screw" Pronunciation: [key] a screw turned by means of an axial hexagonal hole in its head. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Allen Park Allenstein Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language