A Leash

1. A strap, cord or rope with which to restrain an animal, often a dog.

Synonym: lead

2. A brace and a half; a tierce.
3. A set of three animals (especially greyhounds, foxes, bucks, and hares;)
4. A group of three
5. A string with a loop at the end for lifting warp threads, in a loom.
6. (surfing) A leg rope.