Commemoration \Com*mem`o*ra"tion\, n. [L. commemoratio.]

1. The act of commemorating; an observance or celebration designed to honor the memory of some person or event.

This sacrament was designed to be a standing commemoration of the death and passion of our Lord. --Abp. Tillotson.

The commonwealth which . . . chooses the most flagrant act of murderous regicide treason for a feast of eternal commemoration. --Burke.

2. Whatever serves the purpose of commemorating; a memorial.

Commemoration day, at the University of Oxford, Eng., an annual observance or ceremony in honor of the benefactors of the University, at which time honorary degrees are conferred.

Source: Webster's Revised Unabridged Dictionary (1913)