(1):

(n.) 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.

(2):

(n.) A string with a loop at the end for lifting warp threads, in a loom.

(3):

(n.) A thong of leather, or a long cord, by which a falconer holds his hawk, or a courser his dog.

(4):

(v. t.) To tie together, or hold, with a leash.