tanner /ˈtænɚ/ noun5 •a person who makes leather by treating animal skins •A person who applies a tan (especially a spray tan) on someone's skin. •(UK, informal) A former British coin worth six old pence.[A]s you are so flash of your money, though you say you are poor, you may give me a tanner to buy a little baccy with; […] — 1851 •Any of several spider crabs of the genus Chionoecetes, especially Chionoecetes bairdi and Chionoecetes opilio.There were a few Dungeness, a couple of blue kings and one small and indignant squid, but mostly the pot was filled with tanners, Chionoecetes bairdi & Chionoecetes opilio. — 1993 •A long-horned beetle of species Prionus coriarius. formstanners