资料来源 : pyDict

喂!哈罗![特指打电话时] 喂!

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Hullo \Hul*lo"\, interj.
   See {Hollo}.

资料来源 : WordNet®

hullo
     n : an expression of greeting; "every morning they exchanged
         polite hellos" [syn: {hello}, {hi}, {howdy}, {how-do-you-do}]