Definition of PET noun from the Oxford Advanced Learner's Dictionary

  1. 1
    BrE BrE//ˌpiː iː ˈtiː//
    ; NAmE NAmE//ˌpiː iː ˈtiː//
    the abbreviation for polyethylene terephthalate (an artificial substance used to make materials for packaging food, including plastic drinks bottles) See related entries: Waste and pollution
  2. 2
    BrE BrE//pet//
    ; NAmE NAmE//pet//
    (medical) the abbreviation for positron emission tomography (a process that produces an image of your brain or of another part inside your body) a PET scan
  3. 3
    BrE BrE//pet//
    ; NAmE NAmE//pet//
    the abbreviation for Preliminary English Test (a British test now called Cambridge English: Preliminary, set by the University of Cambridge, that measures a person’s ability to speak and write English as a foreign language at an intermediate level)
See the Oxford Advanced American Dictionary entry: PET