yawn
1. yawn \'yo.n, 'ya:n\ vb [ME yenen, yanen, fr. OE ginian; akin to OHG gine-n]to yawn, L hiare, Gk chainein 1: to open wide GAPE 2: to open the mouth wide usu. as an involuntary reaction to fatigue or bo redom : to utter a yawn - yawn.er n 2. yawn n 1: GAP, CAVITY 2: a deep usu. involuntary intake of breath through the wide open mouth