be to do something - definition and synonyms

phrase formal
  1. 1
    used for telling someone what to do

    You are to stay here until I send for you.

  2. 3
    used for saying or asking what should be done

    What are we to do?

    You are to be congratulated on your wise decision.

  3. 5
    used about someone or something in the past to say what would happen at a later time

    the boy who was to become king

See also main entry: be