1. a metal pot or kettle used for boiling water, especially when camping
Usage: chiefly British; Australian
2. a police officer’s club or nightstick
Usage: informal
3. a male goat
Usage: informal

Examples

• We heated water in the billy over the campfire.
• The hiker packed a lightweight billy for making tea.
• The officer carried a billy on his belt.
• The old billy goat stood guard over the herd.
• She filled the billy with fresh water from the stream.
• The police billy was made of polished wood.
• The billy had a distinctive beard and curved horns.