From Longman Dictionary of Contemporary Englishcommemorationcom‧mem‧o‧ra‧tion /kəˌmeməˈreɪʃən/ noun [uncountable] CELEBRATEREMEMBERsomething that makes you remember and respect someone important or an important event in the past SYN remembrancein commemoration of somebody/something a service in commemoration of those who died in the war
Examples from the Corpus
commemoration• It is a commemoration and ensures that people remember the event because it was out of the ordinary, and special.• A 50th anniversary commemoration is planned for November.• It is part and parcel of an annual commemoration of the dead bound by traditions ancient and arcane.• Clare Mallender's commemoration was, however, a different story.• A strange, sad commemoration of the murders that ruined paradise.• The commemoration of the dead in the First World War was seen as a triumphalist commemoration of those who died for Britain. 