freeze up - definition and synonyms

phrasal verb [intransitive] informal
present tense
I/you/we/theyfreeze up
he/she/itfreezes up
present participlefreezing up
past tensefroze up
past participlefrozen up
  1. 1
    if something freezes up, it becomes so cold that it does not work or cannot move

    All the locks had frozen up.

  2. 2
    to be unable to think of anything to say, especially because you are nervous
See also main entry: freeze