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.

(anatomy) A bony thickening on the front of the mandible of an ape.

(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.