stiffener stiffen • stiffening · · · Info · Definitions · Characters · · stiffener · · Text Latin · · Script 9 · · Length Definitions · · · (noun) material used for stiffening something. · · Noun Definition 1 Characters · · e latin small letter e U+0065 f latin small letter f U+0066 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