LETTER

A written message addressed to a person or organization

Example: "Mailed an indignant letter to the editor"

The conventional characters of the alphabet used to represent speech

Example: "His grandmother taught him his letters"

Owner who lets another person use something (housing usually) for hire

A strictly literal interpretation (as distinct from the intention)

Example: "He followed instructions to the letter"

An award earned by participation in a school sport

Example: "He won letters in three sports"