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1. A part of a garment that covers all or part of an arm.
2. A case into which an object or device fits: a record sleeve.
3. A tattoo that covers all or a large part of the arm.
tr.v. sleeved, sleev·ing, sleevesIdiom:
To furnish or fit with sleeves or a sleeve.
up (one's) sleeve
Hidden but ready to be used: I still have a few tricks up my sleeve.