/kəˈmeməreɪt/
com·mem·or·ate
BrE /kəˈmeməreɪt/
NAmE /kəˈmeməreɪt/
~ sth/sb
to remind people of an important person or event from the past with a special action or object; to exist to remind people of a person or an event from the past
A series of movies will be shown to commemorate the 30th anniversary of his death.
A plaque commemorates the battle.