The Illustrated Bible Dictionary
Alleluia
Easton’s Bible Dictionary (1897)
the Greek form (Revelation 19:1, 3, 4, 6) of the Hebrew Hallelujah = Praise ye Jehovah, which begins or ends several of the psalms (106, 111, 112, 113, etc.).
Grace Team University
Full KJV Bible with Greek & Hebrew Lexicons and Commentary