Biannual vs. Annual — What's the Difference?

Occurring twice each year; semiannual.

Recurring, done, or performed every year; yearly

Occurring every two years; biennial.

Of, relating to, or determined by a year

Occurring twice a year; semiannual.

(Botany) Living or growing for only one year or season.

(proscribed) Occurring once every two years; biennial.

A periodical published yearly; a yearbook.

Something occurring twice each year.

(Botany) A plant that completes its entire life cycle in a single growing season.

Occurring twice a year; half-yearly; semiannual.

Happening once every year.

Occurring or payable twice each year

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 circannual.

Having a life cycle that is completed in only one growing season; e.g. beans, corn, marigold. See Annual plant in Wikipedia. Compare biennial, perennial.

(entomology) Living or lasting just one season or year, as certain insects or insect colonies.

An annual publication; a book, periodical, journal, report, comic book, yearbook, etc., which is published serially once a year, which may or may not be in addition to regular weekly or monthly publication.

(botany) An 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 biennial, perennial.

A medical checkup taking place once a year.

(theater) A pantomime taking place once a year.

Of or pertaining to a year; returning every year; coming or happening once in the year; yearly.

Performed or accomplished in a year; reckoned by the year; as, the annual motion of the earth.

Lasting or continuing only one year or one growing season; requiring to be renewed every year; as, an annual plant; annual tickets.

A thing happening or returning yearly; esp. a literary work published once a year.

Anything, especially a plant, that lasts but one year or season; an annual plant.

A Mass for a deceased person or for some special object, said daily for a year or on the anniversary day.

A plant that completes its entire life cycle within the space of a year

A reference book that is published regularly once every year

Occurring or payable every year;

Completing its life cycle within a year;