noun

• (British Columbia) A serving of beer smaller than a pint, typically measuring between 12 and 16 ounces.
  "For example, you may serve a patron a 12 oz sleeve of beer and a 5 oz glass of wine (or alternately 1.5 oz spirits) at the same time."
• (US) A long, cylindrical plastic bag of cookies or crackers, or a similar package of disposable drinking cups.
  "A three-alarm fire tore through a family home on Newark's East Side early Saturday morning, completely gutting the two-story residence and tragically claiming a half-sleeve of Oreo cookies that was trapped inside a cupboard."
• (electrical engineering) A double tube of copper into which the ends of bare wires are pushed so that when the tube is twisted an electrical connection is made. The joint thus made is called a McIntire joint.

verb

• (transitive) To fit and attach a sleeve to an upper garment (e.g. to a shirt, blouse, sweater, jacket, coat, etc.) or to a folder.
• (magic tricks) To hide something up one's sleeve.
  "There are certain types of sleeving that are difficult to perform with the shirt sleeves down, and it is difficult and risky to attempt sleeving while wearing a shirt with "French" cuffs."