I. leash 1 /liːʃ/ BrE AmE noun [countable] especially American English
[ Date: 1200-1300 ; Language: Old French ; Origin: laisse , from laissier ; ⇨ ↑ lease 2 ]
1 . a piece of rope, leather etc fastened to a dog’s collar in order to control it SYN lead British English
on/off a leash
At her side on a leash trotted a small grey dog.
Never leave your dog off the leash outside a store.
2 . keep/have somebody on a leash to control someone – used humorously:
Marcus keeps you on a short leash, does he?
II. leash 2 BrE AmE verb [transitive]
American English to put a leash on a dog