Reminiscing is the act of thinking or talking about past experiences or events. Learn the origin, synonyms, translations and usage of this verb from various sources. Reminiscing definition: the act of recalling past experiences or events, especially with pleasure or nostalgia.. See examples of REMINISCING used in a sentence. Reminisce and its relatives reminiscence and reminiscent all trace back to the Latin verb reminisci, meaning “remember.” Reminisci in turn shares roots with mens, the Latin word for “mind.” remember, recollect, recall, remind, reminisce mean to bring an image or idea from the past into the mind. reminisce (about something/somebody) to think, talk or write about a happy time in your past. We spent a happy evening reminiscing about the past. Definition of reminisce verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.