nautical /ˈnɔːtɪ.kəl/adjective 1noun 1forms 3 adjective1 •Of, relating to, or characteristic of sailing, sailors, or the sea.I was mostly unfamiliar with the nautical terms used in the sailing documentary. noun1 •(no longer used, rare) A nautical person or writer; a sailor.Then comes the formal pompous introduction / Of Slowjohn’s cabin-staff, état major, / Which argued attitudial instruction / Beyond belief, in nauticals ashore. — 1831 formsnauticals · more nautical · most nautical