Meaning of “disqualify” - Learner’s Dictionary

disqualify

verb [ T ] us uk /dɪˈskwɒlɪfaɪ/

to stop someone from being in a competition or doing some other activity because they have done something wrong:

[ often passive ] She was disqualified from the race after a drugs test.
disqualification noun [ U, C ] us uk /dɪˌskwɒlɪfɪˈkeɪʃən/

(Definition of “disqualify” from the Cambridge Learner’s Dictionary © Cambridge University Press)