'Tanka' definitions:

Definition of 'tanka'

(from WordNet)
noun
A form of Japanese poetry; the 1st and 3rd lines have five syllables and the 2nd, 4th, and 5th have seven syllables
noun
A Tibetan religious painting on fabric

Definition of 'Tanka'

From: GCIDE
  • Tanka \Tan"ka\, n. (Naut.) A kind of boat used in Canton. It is about 25 feet long and is often rowed by women. Called also tankia. --S. W. Williams. [1913 Webster]