The Collaborative International Dictionary
Alleluiah
Alleluia \Al`le*lu"ia\, Alleluiah \Al`le*lu"iah\, n. [L. alleluia, Gr. ?, fr. Heb. hall[=e]l[=u]-y[=a]h. See Hallelujah.] An exclamation signifying Praise ye Jehovah. Hence: A song of praise to God. See Hallelujah, the commoner form.
I heard a great voice of much people in heaven, saying, Allelui
--Rev. xix. 1. [1913 Webster] ||
Wiktionary
alleluiah
n. (alternative form of alleluia English)