What is the meaning of Poet_laureate?

A poet officially appointed by a government, often expected to compose poems for state occasions and other government events.

One who received an honorable degree in grammar, including poetry and rhetoric, at the English universities; so called as being presented with a wreath of laurel.

Formerly, an officer of the king's household, whose business was to compose an ode annually for the king's birthday, and other suitable occasions; now, a poet officially distinguished by such honorary title, the office being a sinecure.

Source: wiktionary.org