Definition of "yah"

yah¹

/jʌː/

adverb
not comparable
1. (UK, India, South Africa, Australia, New Zealand) Yes.
interjection
1. An expression uttered to encourage a horse to run faster.

yah²

/jɑː/

noun
plural yahs
1. (British, informal) An upper-class person, especially a Sloane Ranger.

yah³

pronoun
1. Pronunciation spelling of you.
  Quotations
  "Hey, Sis, do yah want a Hertz Donut?" one of them sweetly said as the other one held out a donut bag. She reached for it. Her step-sister snatched the bag away and socked her hard in the arm instead.
  2006, Carmen Portnoy, The Money Pie: A Recipe for Women Investors, page 6