Added 9 October 2026 lifer /ˈlaɪfə(ɹ)/ noun Categories: PeopleRare Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about lifer at Wordnik → Where our words come from → A prisoner sentenced to life in prison. A prisoner sentenced to transportation for life. A person with a singular career path, especially in the military. Related Words: lifeliferenterliferentjailtimelagginglife-leaseprisoness Back to today's word