adj. 1. Recurring, done, or performed every year; yearly: an annual medical examination. 2. Of, relating to, or determined by a year: an annual income. 3. Botany Living or growing for only one year or season. n. 1. A periodical published yearly; a yearbook. 2. Botany A plant that completes its entire life cycle in a single growing season. [Middle English annuel, from Old French, from Late Latin annuālis, ultimately from Latin annus, year; see at- in the Appendix of Indo-European roots.] annu·al·ly adv. |
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