Com-mĕm'o-rā'tion, n.

n. [Lat. commemoratio.] The act of calling to remembrance by some solemnity; the act of honoring the memory of some person or event by solemn celebration. “The elements which Christ had appointed as a commemoration of his death.” Hallam.

Commemoration day, at the University of Oxford, Eng., an annual solemnity in honor of the benefactors of the university. Huber.