- Proper noun. (Greek god) The ancient Greek goddess of saltwater. She was a daughter of either Nereus and Doris, (and thus a nereid), or Oceanus and Tethys, (and thus an oceanid). She was also the wife-consort of Poseidon, and the mother of his son, Triton; her offspring also includes seals and dolphins. Her Roman equivalent is Salacia. .
- Proper noun. (astronomy) (w, 29 Amphitrite) , the asteroid. .