Entry 1 sense Webster, 1913 Seaworthy /sēˈ -wə(r)-thē/ · Sea·wor·thy · IPA /ˈsiːwɝði/ 01 a. Fit for a voyage; worthy of being trusted to transport a cargo with safety; as, a seaworthy ship. 1. Fit for a voyage; worthy of being trusted to transport a cargo with safety; as, a seaworthy ship.