letter

/ˈletər/ noun [C]

Definition

MESSAGE › a written message that you send to someone, usually by post: I got a letter from Paul this morning.

SYMBOL › a symbol that is used in written language and that represents a sound in that language: the letter K → See also covering letter

(Definition of letter noun from the Cambridge Learner's Dictionary © Cambridge University Press)

to express disagreement or refuse to do something

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