sleeve sleeve /ˈsliːv/

noun

1. () The part of a garment that is attached at the armhole and that provides a cloth covering for the arm  ( arm , sleeve )
   the part of a garment that is attached at the armhole and that provides a cloth covering for the arm
    The dress had three-quarter sleeves that were perfect for the weather
   The dress had three-quarter sleeves that were perfect for the weather
   
   
2. Small case into which an object fits  ( sleeve )
   small case into which an object fits
    I bought a protective sleeve for my new tablet.
   I bought a protective sleeve for my new tablet.