deckwise adjective 3adverb 2forms 2 adjective3 •Pertaining to the deck.All things deckwise were under the command of the bosun. — 2008 •Along or toward the deck.Free-running model tests showed that the SSP would heel into a high-speed turn actually somewhat more than necessary for the deckwise components of gravitational and centrifugal force to cancel. — 1974 •Knowledgeable about working as a deckhand. adverb2 •Along or toward the deck.The starched maids who strolled deckwise of an evening had long since tumbled into their bunks to snore like ladies until such hour as they chose luxuriously to arise. — 1912 •Concerning the deck.This lobster boat wasn't much larger, deckwise, than a rowboat, it seemed. — 1993 formsmore deckwise · most deckwise