(n.) A Veteran. One who is long-standing in the field.
(n.) A veterinarian, one who is engaged in seeing to the well being of animals.
(v.) To search the history of someone to evaluate them.
a) I am a veteran of the Golf wars. Fear my VW of doom!
b) I'm ill, take me to the vet. I mean, uh, woof?
c) Ok mr Gumba we need to vet your history before giving you a job as one man army.