← BackshareGuesshilloa/hɪˈloʊə/interjectionAn exclamation used to attract attention or express surprise; a variant of 'hillo' or 'hello'.Hilloa! That's a strange-looking bird.She called out 'Hilloa!' when she spotted her friend in the crowd.Hilloa! What have we here?SynonymshelloheyAntonymsgoodbye