Pronunciation IPA (key): /məˈmɛntoʊ/ Audio (US)(file) Audio (AU)(file) Hyphenation: mo‧men‧to Noun Singular memento Plural mementos or mementoes (countable) A memento is an object that is kept as a reminder of a place or event. Synonyms: keepsake and souvenir I kept the shell as a memento of my visit to the seashore.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads