Definition of Billy

Noun: billy bi-lee

[N. Amer] A short stout club used primarily by policemen
- truncheon, nightstick [N. Amer], baton, billystick [N. Amer], billy club [N. Amer]
Male goat
- billy goat, he-goat
[Brit] A light metal cooking pot used when camping
- billycan [Brit]