Definition of "blotting"

blotting

verb
1. present participle and gerund of blot
noun
plural blottings
1. A blot; a stain.
  Quotations
  the mean blottings of an hireling pen
  1819, William Wastle, The Mad Banker of Amsterdam
2. The process by which something is blotted.
  Quotations
  The per cent water was calculated to be 80.7 after 10 blottings […]
  1963, Proceedings of the Society for Experimental Biology and Medicine