Meaning of “reminisce” - Learner’s Dictionary

reminisce

verb [ I ] uk us /ˌremɪˈnɪs/

to talk about pleasant things that happened in the past:

We were just reminiscing about our school days.
reminiscence noun [ C, U ]

talk in which you reminisce

(Definition of “reminisce” from the Cambridge Learner’s Dictionary © Cambridge University Press)