Brown Driver Briggs

 1. to be unclean, become unclean, become impure
  1) (Qal) to be or become unclean
1a1. sexually
1a2. religiously
1a3. ceremonially
  2) (Niphal)
1b1. to defile oneself, be defiled
1b  1) sexually
1b  2) by idolatry
1b  3) ceremonially
1b2. to be regarded as unclean
  3) (Piel)
1c1. to defile
1c  1) sexually
1c  2) religiously
1c  3) ceremonially
1c2. to pronounce unclean, declare unclean (ceremonially)
1c3. to profane (God's name)
  4) (Pual) to be defiled
  5) (Hithpael) to be unclean
  6) (Hothpael) to be defiled