/ Dictionary / Index S screw-on: Meaning and Definition of Find definitions for: screw-on Pronunciation: (skr'on", -ôn"), [key] — adj. attached, connected, or closed by screwing onto another part of a container or receptacle. (of an earring) held on the earlobe by a small screwlike post with a disk at the tip. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. screw-off screw pile Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language