A sheet material typically used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

A newspaper or anything used as such (such as a newsletter or listing magazine).

(uncountable) Wallpaper.

(uncountable) Wrapping paper.

(rock paper scissors) An open hand (a handshape resembling a sheet of paper), that beats rock and loses to scissors. It loses to lizard and beats Spock in rock-paper-scissors-lizard-Spock.

A written document, generally shorter than a book (white paper, term paper), in particular one written for the Government.

A written document that reports scientific or academic research and is usually subjected to peer review before publication in a scientific journal (as a journal article or the manuscript for one) or in the proceedings of a scientific or academic meeting (such as a conference, workshop, or symposium).

A scholastic essay.

(Britain) A set of examination questions to be answered at one session.

(slang) Money.

(finance, uncountable) Any financial assets other than specie.

(New Zealand) A university course. (Can we add an example for this sense?)

A paper packet containing a quantity of items.

A medicinal preparation spread upon paper, intended for external application.

A substance resembling paper secreted by certain invertebrates as protection for their nests and eggs.

(transitive) To apply paper to.

(transitive) To document; to memorialize.

(transitive) To fill (a theatre or other paid event) with complimentary seats.

(transitive) To submit official papers to (a law court, etc.).

(transitive) To give public notice (typically by displaying posters) that a person is wanted by the police or other authority.

(transitive) To sandpaper.

(transitive) To enfold in paper.

To paste the endpapers and flyleaves at the beginning and end of a book before fitting it into its covers.

Made of paper.

Insubstantial (from the weakness of common paper)

Planned (from plans being drawn up on paper)

Having a title that is merely official, or given by courtesy or convention.