1》 occurring once every year.
2》 calculated over or covering a year.
3》 (of a plant) living only for a year or less, perpetuating itself by seed. Compare with biennial , perennial .
1》 a book or magazine of a series published once a year.
2》 an ~ plant.
ME: from OFr. annuel , from late L. ~is , based on L. annus 'year'.