Definitions of vet:

• noun:   a person who has served in the armed forces
• noun:   a doctor who practices veterinary medicine
• verb:   examine carefully

  Example: "Someone should vet this report before it goes out"

• verb:   work as a veterinarian

  Example: "She vetted for the farms in the area for many years"

• verb:   provide veterinary care for
• verb:   provide (a person) with medical care