window
win.dow \'win-(.)do-, -d*(-w)\ n [ME windowe, fr. ON vindauga, fr. vindr wind + auga eye] often attrib ; akin to OE wind and to OE e-age eye - more at EYE 1: an opening esp. in the wall of a building for admission of light and air usu. closed by casements or sashes containing transparent material (as glass) and capable of being opened and shut 2: WINDOWPANE 3: an opening like or suggestive of a window (as a shutter, slot, valve) 4: the transparent panel of a window envelope 5: the framework (as a shutter or sash with its fittings) that closes a win dow opening 6: strips of foil dropped from airplanes to interfere with radar detection
Webster's English Dictionary