Definition of "whitehead"

whitehead

noun
plural whiteheads
1. A pimple formed by a clogged sebaceous gland, usually with a milky-white cap.
  Quotations
  Ma was taking a sterilized needle to a whitehead on my chin.
  2020, Avni Doshi, Burnt Sugar, Hamish Hamilton, page 151
2. A species of passerine bird, endemic to New Zealand (Mohoua albicilla)
3. The blue-winged snow goose, Anser caerulescens caerulescens.
4. The surf scoter duck.
5. A domestic pigeon of a particular breed; a white-tailed monk.