/ Dictionary / Index S square splice: Meaning and Definition of Find definitions for: square' splice" Pronunciation: [key] — Carpentry. Carpentry. a scarf joint between two pieces, having the form of a half-lap joint with a thicker and a thinner section for each piece, the thicker one being at the end: used to resist tension. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. square-shouldered squaresville Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language