What is the meaning of letter?

noun

• A written message addressed to a person or organization.
  • usage: "mailed an indignant letter to the editor"
  • synonyms: missive
• The conventional characters of the alphabet used to represent speech.
  • usage: "his grandmother taught him his letters"
  • synonyms: letter of the alphabet, alphabetic character
• Owner who lets another person use something (housing usually) for hire.
• A strictly literal interpretation (as distinct from the intention. )
  • usage: "he followed instructions to the letter"; "he obeyed the letter of the law"
• An award earned by participation in a school sport.
  • usage: "he won letters in three sports"
  • synonyms: varsity letter

verb

• Win an athletic letter.
• Set down or print with letters.
• Mark letters on or mark with letters. .