'Hullo' definitions:

Definition of 'hullo'

From: WordNet
noun
An expression of greeting; "every morning they exchanged polite hellos" [syn: hello, hullo, hi, howdy, how- do-you-do]

Definition of 'Hullo'

From: GCIDE
  • Hullo \Hul*lo"\, interj. See Hollo. [1913 Webster]