oversail UK /əʊvəˈseɪl/US /oʊvəɹˈseɪl/verb 2/ˈoʊvəɹseɪl/ noun 1forms 3 verb2 •To project from a structure above (something); to overhang. •To project over (as of a crane, bridge or cables over neighbouring property); especially in relation to any legal right to do so. oversail UK /ˈəʊvəseɪl/US /ˈoʊvəɹseɪl/ noun1 •The projection of something from a structure. formsoversailed · oversailing · oversails