Added 10 October 2026 thea noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. More about thea at Wordnik → Where our words come from → (Greek mythology) the Titaness who was mother of Helios and Selene and Eos in ancient mythology. Related Words: theiatheotitantheolatheodosiatheclathedathaistheodoratheophilaantheatheophilus Back to today's word