Breadcrumb Home > Dictionary > Index S sand jack: Meaning and Definition of Find definitions for: sand' jack" Pronunciation: [key] — Shipbuilding. Shipbuilding. any of a number of containers of sand driven beneath a hull about to be launched as a temporary support and then drained of sand so as to let the hull down onto the launching cradle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sandiver S and L TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: irascible Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language