window sill windowsill • window-smashing · · · Info · Definitions · Characters · · window sill · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) the sill of a window; the horizontal member at the bottom of the window frame. Synonyms: windowsill. · · Noun Definition 1 Characters · · space U+0020 d latin small letter d U+0064 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 s latin small letter s U+0073 w latin small letter w U+0077