Added 28 September 2026 buoyant /ˈbɔɪ.ənt/ adjective Categories: MotivationalDescribing WordsRare Words adjective ! Definition written for WordofTheDay.US. More about buoyant at Wordnik → Where our words come from → Cheerful and optimistic; able to stay positive even under pressure. Despite the setback, the team remained buoyant and kept pushing forward. Related Words: cheerfuloptimisticupbeatresilient Back to today's word