yawn /jan; jon/ vi [VP2A, C] 1 take (usu involuntarily) a deep breath with the mouth wide open, as when sleepy or bored. 打呵欠。 2 be wide open: 張開(kāi); 裂開(kāi)： ~ing fissure. 張開(kāi)的裂縫。 A gulf ~ed at our feet. 一個(gè)深坑在我們腳前豁然展開(kāi)。 n [C] act of ~ing ⑴打呵欠。