|Origin:||defier, from Latin fidere 'to trust'|
de‧fy past tense and past participle defied, present participle defying, third person singular defies [transitive]
to refuse to obey a law or rule, or refuse to do what someone in authority tells you to do [↪ defiance]:
people who openly defy the law
to be almost impossible to describe or understand:
The beauty of the scene defies description.
to not happen according to the principles you would expect:
a 16-week premature baby who defied the odds and survived
4 spoken formal
used when you ask someone to do something that you think is impossible:
I defy anyone to prove otherwise.