occurring once every year:

年1回の, 毎年の, 年刊の

e.g. the sponsored walk became an annual event

e.g. an annual report

e.g. the union's annual conference.

calculated over or covering a period of a year:

1年間の

e.g. an annual rate of increase

e.g. his basic annual income

e.g. annual accounts.

(of a plant) living for a year or less, perpetuating itself by seed:

〘植〙 1年生の

e.g. annual flowers.

a book or magazine that is published once a year under the same title but with different contents:

年刊誌, 年鑑, 年報

e.g. a Christmas annual

e.g. trade journals, annuals, and directories.

an annual plant:

〘植〙 1年生植物, 1年草(→ biennial, perennial).

e.g. sow annuals in spring.

late Middle English: from Old French annuel, from late Latin annualis, based on Latin annus ‘year’.