sash fastener sash fast • sash holder · · · Info · Definitions · Synonyms · Characters · · sash fastener · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) a lock attached to the sashes of a double hung window that can fix both in the shut position. Synonyms: sash fastener, sash lock, window lock. · · Noun Definition 1 Synonyms · · · sash lock · · Synonym 1 window lock · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 f latin small letter f U+0066 h latin small letter h U+0068 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