1.A thong of leather, or a long cord, by which a person may hold or restrain an animal, such as a falconer holding his hawk, or a courser his dog. For dogs and cats, the leash is commonly attached to a collar around the neck of the animal. "Even like a fawning greyhound in the leash."
2.(Sporting) A brace and a half; a tierce; three; three creatures of any kind, especially greyhounds, foxes, bucks, and hares; hence, the number three in general. "(I) kept my chamber a leash of days." "Then were I wealthier than a leash of kings."
3.(Weaving) A string with a loop at the end for lifting warp threads, in a loom.