ab meaning and definition

AB noun

Definition of AB (noun)

1. a bachelor's degree in arts and sciences
   • synonyms: Artium Baccalaurens, BA, Bachelor of Arts
2. the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
   • synonyms: Av
3. the muscles of the abdomen
   • synonyms: abdominal, abdominal muscle
4. the blood group whose red cells carry both the A and B antigens
   • synonyms: group AB, type AB