valid is on the Academic Word List.

Pronunciation

change

Adjective

change

Positive
valid

Comparative
more valid

Superlative
most valid

  1. If something is valid, it is correct, appropriate, and acceptable.
    I'm sorry sir, your driver's license is not valid.
    I think we should listen to her. She makes a valid argument.
    To log in, you need a valid password.
change