letter

noun
UK /ˈlet.ər/
US /ˈlet̬.ɚ/

A letter is a written message that you send to someone.

I wrote a letter to my grandma to say thank you.


OTHER MEANINGS

2. One of the symbols of the alphabet used to write words.

The word 'cat' has three letters.

3. To write letters on something.

She lettered her name on the poster.