(law); (obsolete); (uncountable) Abatement; reduction; (countable) an instance of this. / (uncountable) Deduction; subtraction; (countable) an instance of this.

(transitive, intransitive, law, chiefly historical) To enter upon and unlawfully seize (land) after the owner has died, thus preventing an heir from taking possession of it.

An Italian abbot or other member of the clergy.

(historical, obsolete) A table or tray scattered with sand which was used for calculating or drawing.

(Canada, US, Australia) An edible univalve mollusc of the genus Haliotis, having a shell lined with mother-of-pearl. / (Canada, US, Australia) The meat of the aforementioned mollusc.

(informal) abdominal muscle.

(slang) An abscess caused by injecting an illegal drug, usually heroin.

(climbing, informal) To abseil. / Abbreviation of abort.

Abbreviation of abortion.

Abbreviation of about.