tannageEtymologyFrom tan + -age.nounThe act, operation, or result of tanning; a tanning.“They should have got his cheek fresh tannage / Such a day as to-day in the merry sunshine! / Had they stuck on his fist a rough-foot merlin!”The act of steeping cast slabs of artificial marble in a solution of potash alum to harden it and make it insoluble.