missive

noun
UK /ˈmɪsɪv/
US /ˈmɪsɪv/

A missive is a letter or a written message that someone sends.

The king sent a missive to the neighboring kingdom asking for peace.


OTHER MEANINGS

2. A long or official letter sent by an authority.

The general received a missive from headquarters with new orders.

3. A written communication sent between people or groups.

She read the missive from her pen pal with great excitement.

4. A formal or important written message.

The school sent a missive to parents about the new schedule.