Definitions of formed:

• adjective:   having taken on a definite arrangement

  Example: "Cheerleaders were formed into letters"

• adjective:   having or given a form or shape
• adjective:   fully developed as by discipline or training

  Example: "A fully formed literary style"

• adjective:   formed in the mind
• adjective:   clearly defined

  Example: "I have no formed opinion about the chances of success"