Investigate someone thoroughly, especially in order to ensure that they are suitable for a job requiring secrecy, loyalty, or trustworthiness.
Derives from late 14th century Norway where you would investigate and check if a visitor was a vette (a supernatural being or troll) before letting them into your home.
The origin of the word is Proto-Germanic *wihti and is related to the german word "Wicht" and english "wight" and Old Norse ; «vǣt(t)r».
Vetting is the process of 1) performing a background check on someone before offering them employment, nominating them to be a political candidate or corporate officer, dating someone you meet online, or conferring an award, or, 2) doing fact-checking prior to accepting something as being true and/or making any decision. Also "vet", "To vet"
1) The FBI engages in vetting before hiring anyone.
2) Before accepting anything the Mainstream Media publishes is true, I engage in vetting to assess for my self if it is true.