prior is on the Academic Word List.

Pronunciation change

Preposition change

Preposition
prior

  1. If something happens prior to something else, it happens before it.
    In this recipe, most of the work is actually done prior to cooking.
    Prior to 1917 most people had lived on private farms.

Adjective change

Positive
prior

Comparative
none

Superlative
none

  1. (usually before a noun) occurring before
    We learned that police had prior knowledge of the attack.
    Few of these workers have any substantial prior experience in industry.

Synonyms change