hallelujah
Concise Oxford English Dictionary © 2008 Oxford University Press:
hallelujah /ˌhalɪˈluːjə/ (also alleluia)
▶exclamation God be praised. ▶noun an utterance of the word ‘hallelujah’.
■ (usu. Alleluia) a piece of music or church liturgy containing this.
– origin OE, via eccles. L. alleluia from Gk allēlouia, or directly from Heb. hallĕlūyāh ‘praise ye the Lord’.
'hallelujah' also found in these Oxford entries:

