·noun The third canonical book of the Old Testament, containing the laws and regulations relating to the priests and Levites among the Hebrews, or the body of the ceremonial law.
The third book of the Pentateuch; so called in the Vulgate, after the LXX., because it treats chiefl...
Easton's Bible Dictionary
The third book in the Pentateuch is called Leviticus because it relates principally to the Levites a...
William Smith's Bible Dictionary