Isis

UK: /ˈaɪsɪs/ US: (ī′sis)

WordReference Random House Unabridged Dictionary of American English © 2026

I•sis  (ī′sis), n. 

1. Eastern Religions [Egyptian Relig.] a goddess of fertility, the sister and wife of Osiris and mother of Horus, and usually represented as a woman with a cow's horns with the solar disk between them: later worshiped in the Greek and Roman empires.

• Egyptian 'st
• Greek Îsis
• Latin

Collins Concise English Dictionary © HarperCollins Publishers::

Isis / ˈaɪsɪs/ noun

1. the local name for the River Thames at Oxford

Isis / ˈaɪsɪs/ noun

1. an ancient Egyptian fertility goddess, depicted as a woman with a cow's horns, between which was the disc of the sun; wife and sister of Osiris