Definition of "unlasting"

unlasting¹

verb
1. present participle and gerund of unlast

unlasting²

adjective
not comparable
1. (obsolete) Not lasting.
  Quotations
  Unlasting passion, soon outworn conceit,Whereon I built, and on so dureless trust!
  a. 1618, Sir Walter Raleigh, The 21st and Last Book of the Ocean, to Cynthia