Definition of "ja"

ja¹

adverb
not comparable
1. (chiefly South Africa, informal) Yes.
  Quotations
  Ja, he had been fooled and it was not pleasant for a man to go home and tell his wife that he been verneuked.
  1940, Penguin Parade (issue 7, page 25)

ja²

noun
plural jas or ja
1. (Korean units of measure) Synonym of Korean foot: a traditional unit of length equivalent to about 30.3 cm.