Hallelujah, also spelled halleluiah, halleluyah, and the Greek and Latin form alleluia are transliterations of the Hebrew word הללו יה (Modern halleluya, Tiberian halləlûyāh) meaning “Praise ye Yah” or “Praise Jah, you people”. “Praise Jah” is a shortened form of “Praise Yahweh” or, in another transliteration of the name, “Praise Jehovah”, It is used in different ways in Christian liturgies. The last syllable is from the first two letters of the name of God, YHWH (also written JHVH). Hallelujah is found primarily in the book of Psalms. The word is used in Judaism as part of the Hallel prayers, and in Christian prayer. It has been accepted into the English language and has a similar pronunciation in many other languages.The Hebrew meaning of the word halləlû-yāh, is praise Yahweh
The term is used 24 times in the Hebrew Bible (mainly in the book of Psalms, e.g. 111–117, 145–150, where it starts and concludes a number of Psalms) and four times in Greek transliteration in the Christian Book of Revelation.
In the Hebrew Bible hallelujah is actually a two-word phrase, not one word. The first part, hallelu, is the second-person imperative masculine plural form of the Hebrew verb hallal. However, “hallelujah” means more than simply “praise Yah”, as the word hallel in Hebrew means a joyous praise in song, to boast in God. Hallel could also refer to someone who acts madly or foolishly.The second part, Yah, is a shortened form of YHWH, the name for the Creator.
Hymns in this category were simply composed as praises to the Lord.As David puts it in Psalms150: Let everything that has breath praise the Lord!
We Join the Angelic choir in Heaven and lift up praises to the King of Glory.
Rev5:13 To Him who sits on the throne and to the lamb be praise and honor and glory and power for ever and ever!