sel'-e-brat: Of the three Hebrew words so rendered halal, "to praise" is preeminently significant. It is an onomatopoetic word meaning "to give a clear sharp sound," as word in vocal rejoicing, celebration. Its equivalent in Ethiopic is ellell, German hallen, English halloo, and appears in the great choral word Hallelujah of the Hebrew religion. Passing into Christian use it has become the term most expressive of majestic praise. Ps 113:1-9 through Ps 118:1-29 and Ps 136:1-26 are called Hallel psalms. Found in Hezekiah's psalm of praise for his miraculous recovery: "Death cannot celebrate thee" (Isa 38:18). chaghagh, root meaning "to move in a circle" hence, "to keep a festival" by sacred leaping and dancing; "celebrate (the Revised Version (British and American) "keep") a feast" (Le 23:41); shabhath, "to rest," i.e. keep or observe a holy day; "celebrate (the Revised Version (British and American) "keep") your sabbath" (Le 23:32).
⇒See the definition of celebrate in the KJV Dictionary
Dwight M. Pratt