insulate UK /ˈɪnsjʊleɪt/US /ˈɪnsʊleɪt/verb 2adjective 1forms 3 verb2 •To separate, detach, or isolate. •To separate a body or material from others, e.g. by non-conductors to prevent the transfer of electricity, heat, etc.Ceramic can be used to insulate power lines. adjective1 •Of pollen or spores, with superficial ornamentation grouped in circular or polygonal areas separated by grooves.Among nonwinged grains, the sexine is rugulate, insulate, or microverrucate. — 1983 formsinsulated · insulating · insulates