Source : Webster's Revised Unabridged Dictionary (1913)

Tanner \Tan"ner\, n. [Etym. uncertain.]
   A sixpence. [Slang, Eng.]

Tanner \Tan"ner\, n.
   One whose occupation is to tan hides, or convert them into
   leather by the use of tan.

Source : WordNet®

tan
     adj : of a light yellowish-brown color
     [also: {tanning}, {tanned}, {tannest}, {tanner}]

tan
     n 1: a browning of the skin resulting from exposure to the rays
          of the sun [syn: {suntan}, {sunburn}, {burn}]
     2: a light brown [syn: {topaz}]
     3: ratio of the opposite to the adjacent side of a right-angled
        triangle [syn: {tangent}]
     [also: {tanning}, {tanned}, {tannest}, {tanner}]

tanner
     n 1: a small coin of the United Kingdom worth six pennies; not
          minted since 1970 [syn: {sixpence}]
     2: a craftsman who tans skins and hides

tan
     v 1: treat skins and hides with tannic acid so as to convert them
          into leather
     2: get a tan, from wind or sun [syn: {bronze}]
     [also: {tanning}, {tanned}, {tannest}, {tanner}]

tanner
     See {tan}