Separation sep-a-ra'-shun: In the Pentateuch the word niddah specially points to a state of ceremonial uncleanness (Leviticus 12:2, Leviticus 12:5, Leviticus 15:20, Numbers 6:4, Numbers 12:13, Numbers 19:21). For a description of the "water of purification," used for cleansing what was ceremonially unclean (Numbers 419:1), see HEIFER, RED, UNCLEANNESS. For "separation" in the sense of nezer, see NAZIRITE.