letter
nounUK /ˈlet.ər/
US /ˈlet̬.ɚ/
A letter is a written message you send to someone.
I wrote a letter to my grandma to say thank you.
OTHER MEANINGS
2. One of the symbols used to write words, like A, B, or C.
The word 'cat' has three letters.
3. The exact words of a rule or law, not just its general meaning.
The school followed the letter of the law about safety.
4. A symbol or sign printed on something, like a letter on a shirt.
He wore a jacket with a big letter on the back.