undershirt undershire • undershoe · · · Info · Definitions · Synonyms · Characters · · undershirt · · Text Latin · · Script 10 · · Length Definitions · · · (noun) a collarless men's undergarment for the upper part of the body. Synonyms: singlet, vest. · · Noun Definition 1 Synonyms · · · singlet · · Synonym 1 vest · · Synonym 2 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E 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