A hymn is a type of song, usually religious, specifically written for the purpose of adoration or prayer, and typically addressed to a deity or deities, or to a prominent figure or personification. The word hymn derives from Greek ὕμνος (hymnos), which means "a song of praise". A writer of hymns is known as a hymnodist. The singing of hymns is called hymnody. Collections of hymns are known as hymnals or hymn books. Hymns may or may not include instrumental accompaniment.
Although most familiar to speakers of English in the context of Christianity, hymns are also a fixture of other world religions, especially on the Indian subcontinent. Hymns also survive from antiquity, especially from Egyptian and Greek cultures. Some of the oldest surviving examples of notated music are hymns with Greek texts.
Ancient hymns include the Egyptian Great Hymn to the Aten, composed by Pharaoh Akhenaten; the Hurrian Hymn to Nikkal; the Vedas, a collection of hymns in the tradition of Hinduism; and the Psalms, a collection of songs from Judaism. The Western tradition of hymnody begins with the Homeric Hymns, a collection of ancient Greek hymns, the oldest of which were written in the 7th century BC, praising deities of the ancient Greek religions. Surviving from the 3rd century BC is a collection of six literary hymns (Ὕμνοι) by the Alexandrian poet Callimachus.