What is the meaning of the word "veteran"?

Definitions:

  1. a person who has served in the armed forces copy to clipboard noun
    • There are many veterans in my family. copy to clipboard
  2. a serviceman who has seen considerable active service copy to clipboard noun
    • The veterans laughed at the new recruits. copy to clipboard
  3. an experienced person who has been through many battles copy to clipboard noun
    • I am a veteran when it comes to exams. copy to clipboard
  4. rendered competent through trial and experience copy to clipboard adjective
    • I am a veteran footballer. copy to clipboard