an object or item that serves to remind one of a person, past event, etc.; keepsake; souvenir.

anything serving as a reminder or warning.

( initial capital letter, italics ) Roman Catholic Church . either of two prayers in the canon of the Mass, one for persons living and the other for persons dead.

noun

keepsake , memorial , relic , remembrance , remembrancer , reminder , token , trace , trophy , vestige , souvenir