GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Whitener (?), n.
   1. One who, or that which, whitens; a bleaching agent; a bleach; a bleacher; a blancher; a whitewasher.
   
   [1913 Webster]
   
   
   2. A chemical used as an adjunct to laundering white cloth, which makes white cloth appear whiter.  A bluing agent.
   
   [PJC]