insulator insulation • insulin · · · Info · Definitions · Synonyms · Antonyms · Characters · · insulator · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity. Synonyms: dielectric, nonconductor. · · Noun Definition 1 Synonyms · · · dielectric · · Synonym 1 nonconductor · · Synonym 2 Antonyms · · · conductor · · Antonym 0 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075