Look up sleeve in Wiktionary, the free dictionary.

A sleeve is the part of a garment that covers the arm, or through which the arm passes or slips.

Sleeve may also refer to:

• Arm coverings:
  • A basketball sleeve, an accessory worn by basketball players
  • A sleeve tattoo, a tattoo arrangement that covers most or all of a person's arm
• Cylindrical mechanical protective liners:
  • A sleeve (construction), used by electricians and plumbers to create an opening in cast concrete to permit the passage of a wires or pipes
  • A cylinder sleeve lining the bore of a piston engine
  • A sleeve valve, a type of valve mechanism for piston engines
  • A sleeve bearing to hold a rotating shaft
  • Generally, any tube into which another tube is inserted; in the case of small tubes it is called a thimble
• Other protective covers:
  • A record sleeve, the outer covering of a vinyl record
  • A card sleeve used to protect trading cards from damage during play
  • A beer sleeve or koozie
• A sleeve gastrectomy, a surgical weight-loss procedure