v.
1.provide evidence for
2.authenticate, affirm to be true, genuine, or correct, as in an official capacity
3.give testimony in a court of law
4.establish or verify the usage of
Idiom of the Day
round-robin letter
a letter written by a group of people with each person writing part of the letter
We sent a round-robin letter to the other members of the staff to try and get help for the annual flea market.