Added 10 October 2026 one-time adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about one-time at Wordnik → Where our words come from → Belonging to some prior time. erstwhile friend Related Words: nonrecurringone-offonce-in-a-lifetimeonetimeone-shotoccasionalone-of-a-kindspecialsingularspecificuniqueshort-term Back to today's word