late 14c., "a calling to mind," also "service or church festival commemorating something," from Old French comemoration, from Latin commemorationem (nominative commemoratio) " [..]

a ceremony to honor the memory of someone or something memorial: a recognition of meritorious service (commemorate) mark by some ceremony or observation; "The citizens mark the anniversar [..]

The act of remembering a person or an event. Usually involves a ceremony or service.

(n) a ceremony to honor the memory of someone or something(n) a recognition of meritorious service

To recognize the heritage value or character of a building, site or other resource. Often involves the placing of a plaque or other marker. Commemoration does not means protection or legal restriction of any kind. (In Heritage BC - http://www.heritagebc.ca/resources/guides-tips-1/terms-definitions) Events, often but not always ceremonious or celebr [..]

The act of commemorating; an observance or celebration designed to honor the memory of some person or event. Whatever serves the purpose of commemorating; a memorial.

To remember or mark a particular event or person from the past through ceremony or memorial.