Definition of harnass:
(n) :
(rare, archaic) Alternative spelling of harness. [(countable) A restraint or support, especially one consisting of a loop or network of rope or straps, and especially one worn by a working animal such as a horse pulling a carriage or farm implement.]
(v) :
(rare, archaic) Alternative spelling of harness. [(transitive) To place a harness on something; to tie up or restrain.]