1. shouting or calling out loudly, especially to attract attention or drive animals
Usage: present participle of 'hilloah' or 'hillo'; chiefly British and archaic

Examples

• The farmer was hilloaing across the field to round up the cattle.
• He heard someone hilloaing from the distance.
• The hunters were hilloaing to signal each other through the woods.
• She stood at the cliff's edge, hilloaing to test the echo.
• The children were hilloaing and running through the meadow.