1. past tense of hallo; shouted or called out loudly to attract attention or express greeting

Examples

• The hunter halloed to his companions across the valley.
• She halloed from the doorway to get their attention.
• The children halloed excitedly when they saw the parade approaching.
• He halloed a greeting to his neighbor working in the garden.
• The guide halloed to warn the hikers of the approaching storm.
• They halloed back and forth across the canyon to test the echo.