As a Noun: 1. A message written on a piece of paper and which has been sent to someone, usually through the post. English = letter, missive, correspondence. 2. A formal written request to someone to ask to have something, especially a job from an employer. English = application. As a Verb or Adjective: 1. To send a written message on a piece of paper to someone, usually through the post. English = correspond. 2. To write formally to someone to ask to have something, especially to an employer for a job. English = apply.