[ 'rɛkwɪəm , -ɪɛm ]
■ noun
1》 (especially in the Roman Catholic Church) a Mass for the repose of the souls of the dead.
2》 a musical composition setting parts of such a Mass.
3》 an act or token of remembrance.
Origin
ME: from L. (first word of the Mass), accusative of requies 'rest'.