Reminiscence refers to the act or process of remembering past events, experiences, or memories. It is a mental activity in which an individual recalls and reflects on something that happened in their life, often triggered by specific cues such as sights, sounds, smells, or other sensory inputs. Reminiscence can have positive effects on emotional well-being, reducing feelings of loneliness and improving mood. It is a natural process that occurs throughout an individual's lifetime, becoming more frequent and vivid as they age.