Third-person singular simple present indicative form of ab

(immunology) Antibody.

(Judaism) Av.

A diminutive of the male given name Abner, from Hebrew, occasionally used as a formal given name.

(dated) In Egyptian belief, the heart and will and conscience of a person, especially that of the recently deceased which proceeds to the afterlife and is weighed as evidence during his or her judgement.

(title) Abbreviation of Abbot.

(intransitive, infinitive, Britain, uncommon) To be.

(automotive) Initialism of antilock braking system. / (organic chemistry) Initialism of acrylonitrile butadiene styrene.

(slang, of a person) Having visible abdominal muscles; having abs. / (slang, of a person, in combination, by extension) Having abdominal muscles of a specified kind.

simple past tense and past participle of ab