Added 10 October 2026 leto noun Categories: PeopleRare Words noun ! Definition from WordNet 3.1, Princeton University. More about leto at Wordnik → Where our words come from → Wife or mistress of Zeus and mother of Apollo and Artemis in ancient mythology; called Latona in Roman mythology. Related Words: latonayearartemisapollocallistophoebeledadianalethelaetitiaeleutheriamerope Back to today's word