Synonyms:
hello, hullo, hi, howdy, how-do-you-do
Meaning: an expression of greeting; "every morning they exchanged polite hellos"
Usage examples
The horse stopped at the house and a voice, that stirred the blood in the young man's veins, called, "Howdy, Aunt Mollie."
As the figure of the traveler emerged from the mists, the native checked his horse to greet the newcomer with the customary salutation of the backwoods, "Howdy."