a Of, for, or relating to a whole year, often as a recurring cycle; determined or reckoned by the year; accumulating in the course of a year; performed, executed, or completed over the course of a year. See also (term|circannual).
a (botany) (of a plant) Having a life cycle that is completed in only one growing season; e.g. beans, corn, marigold. See w:Annual_plant | Annual plant in Wikipedia. Compare (term|biennial), (term|perennial).
a (entomology) Living or lasting just one season or year, as certain insects or insect colonies.
n (botany) An w:Annual_plant | annual plant; a plant with a life span of just one growing season; a plant which naturally germinates, flowers and dies in one year. Compare (term|biennial), (term|perennial).