sleeve /sliːv/ BrE AmE noun [countable]
[ Language: Old English ; Origin: sliefe ]
1 . the part of a piece of clothing that covers all or part of your arm:
a dress with long sleeves
a short-sleeved shirt
2 . have something up your sleeve informal to have a secret plan or idea that you are going to use later:
Don’t worry. He still has a few tricks up his sleeve.
3 . a stiff paper cover that a record is stored in SYN jacket