Best definition
note that is issued by authorities for someone who is to be arrested
Mr. XY, we have an (arrest) warrant. Please come with us.
warrant: define #2
1. An invitation to immediately be detained by law enforcement.

2. A term that also means a reasoning factor.
Why do i have a funny feeling about a warrant?

Does someone we know have a warrant?

What warrants the feeling of secrecy and lies in every aspect of ones life?