Meaning of the word missive in English

What does missive mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

missive

US /ˈmɪs.ɪv/
UK /ˈmɪs.ɪv/

Noun

a letter, especially a long or official one

Example:
The ambassador sent a lengthy missive to his government.
She received a formal missive from the university regarding her application.