lock in - definition and synonyms

phrasal verb [transitive]
present tense
I/you/we/theylock in
he/she/itlocks in
present participlelocking in
past tenselocked in
past participlelocked in
  1. 1
    to put someone in a room and lock the door so they cannot leave

    You can’t keep me locked in.

    She went to her hotel room and locked herself in.

  2. 2
    lock in profits/gains etc business to get a financial benefit that continues for a long time, for example by selling shares that have gone up in value before they can go back down
See also main entry: lock