of, for, or pertaining to a year; yearly

annual salary.

occurring or returning once a year

an annual celebration.

Botany . living only one growing season, as beans or corn.

performed or executed during a year

the annual course of the sun.

Entomology . living or lasting but one season or year, as certain insects or colonies of insects.

Botany . a plant living only one year or season.

a book, report, etc., published annually.

adverb

by the year , each year , every year , once a year , per annum , per year , year after year