A flat, rigid structure, fixed at right angles to a wall or forming a part of a cabinet, desk etc., and used to support, store or display objects. / The capacity of such an object

(idiomatic) Laid aside, unused, abandoned. / (idiomatic, especially of a woman) Unmarried, typically through lack of interest from potential spouses. / (idiomatic, sports) Injured.

plural of shelfful

Enough to fill a shelf.

(chemistry) A round piece of laboratory equipment used mostly in school demonstrations to support a gas jar whilst a gas is being collected over water.

(US, idiomatic) Best, or high quality. / (Britain, idiomatic) Describing books, magazines, or movies that have adult content or softcore pornography.

(Canada, ice hockey) The upper part of the goal.

A thick, floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface. Ice shelves are found in Antarctica, Greenland, and Canada only.

(idiomatic) As purchased or as commonly available, without modification or customization.

Alternative form of off-the-shelf.