1. a shout or call used to attract attention or greet someone
Usage: chiefly British variant of 'hello'

1. to shout 'hallo' in order to attract someone's attention
Usage: chiefly British

Examples

• Hallo! Can you hear me from over there?
• She halloed across the field to get the farmer's attention.
• Hallo, old friend! It's been ages since we last met.
• He halloed loudly to summon the hunting dogs.
• Hallo there! Welcome to our home.