Greek for "Lord," the first word of a very ancient short hymn commonly sung during Communion services in Lent. In English, it goes, "Lord, have mercy, Christ, have mercy, Lord have mercy."
Kyrie is the vocative case of the Greek word κÏÏιος (kyrios - lord) and means O Lord; it is the common name of an important prayer of Christian liturgy, also called Kyrie eleison.
"Kyrie" was a #1 hit song by the 1980s pop/rock band Mr. Mister, from their 1985 album Welcome to the Real World. Released in late 1985, it hit the top spot on the Billboard Hot 100 charts in March of 1986, where it was #1 for two weeks.