a written or printed communication addressed to a person or organization and usually transmitted by mail.

a symbol or character that is conventionally used in writing and printing to represent a speech sound and that is part of an alphabet.

a piece of printing type bearing such a symbol or character.

a particular style of type.

such types collectively.

Often, letters. a formal document granting a right or privilege.

actual terms or wording; literal meaning, as distinct from implied meaning or intent ( opposed to spirit )

the letter of the law.

letters, ( used with a singular or plural verb )

literature in general.

the profession of literature.

learning; knowledge, esp. of literature.

an emblem consisting of the initial or monogram of a school, awarded to a student for extracurricular activity, esp. in athletics.

to mark or write with letters; inscribe.

to earn a letter in an interscholastic or intercollegiate activity, esp. a sport

He lettered in track at Harvard.

to the letter

to the last particular; precisely

His orders were carried out to the letter.