A sleeve is that part of a garment which covers the arm, or through which the arm passes or slips, or by analogy:
- Arm coverings:
- A basketball sleeve, an accessory worn by basketball players
- A sleeve tattoo, a tattoo arrangement which 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 (penetration) in cast concrete to permit the passage of a wires or pipes (penetrant)
- 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.
- Sleeve (musician) known for a Christmas song with particular emphasis on the chorus which was lampooned by Anthony Cumia of the Opie and Anthony Show and for which the musician presented a tongue-in-cheek version tailored for Cumia.