An abridgment (British spelling abridgement) is a condensing or reduction of a book or other creative work into a shorter form while maintaining the unity of the source. The abridgment can be true to the original work in terms of mood and tone, capturing the parts the abridging author perceives to be most important; it could be a complete parody of the original or it could fall anywhere in between, generally capturing the tone and message of the original author but falling short in some manner or subtly twisting their words and message to favor a different interpretation or agenda.

A written work may be abridged to make it more accessible to a wider audience; for example, to make an adaptation of it as an audio book or a television show, to make a more convenient companion to an already-established work or to create a shorter reference version.

Unabridged is the opposite of abridged. A common example is an unabridged dictionary.