Definition of "yon"

yon¹

/jɒn/

adjective
not comparable
1. (dated or dialectal) distant, but within sight; (that thing) just over there.
  Quotations
  Read thy lot in yon celestial sign.
  1667, John Milton, “Book IV”, in Paradise Lost. […], London: […] [Samuel Simmons], […]; republished as Paradise Lost in Ten Books: […], London: Basil Montagu Pickering […], 1873,
  " […] Yet first let me close yonder shutters; the slanting rain is beating through the sash. I will bar up." "Are you mad? Know you not that yon iron bar is a swift conductor? Desist."
  1856, Herman Melville, The Lightning Rod Man
  "Do my eyes deceive me, or is yon object a Puddin'?" he cried.
  1918, Norman Lindsay, The Magic Pudding, Sydney: Angus and Robertson, page 158
  His head... his head... his face... it wisnae there. Nae black curly hair, nae eyes - I've never seen eyes sae blue as Joe's. Irises blue as yon sky. Blown tae smithereens... his gorgeous, bonny head, no there.
  2012 Spring, Gerda Stevenson, “Federer versus Murray”, in Salmagundi
adverb
not comparable
1. (dated or dialectal) yonder.
pronoun
1. (dated or dialectal) That one or those over there.
  Quotations
  As soon as old Andrew came home, his wife and he, as was natural, instantly began to converse on the events of the preceding night; and in the course of their conversation Andrew said, "Gudeness be about us' Jean, was not yon an awfu' speech o' our bairn's to young Jock Allanson last night?"
  1828, James Hogg, Mary Burnet

phrase
1. (knitting) Acronym of yarn over needle.
  Quotations
  Buttonhole row: (K1, p1) 3 times, yon, k2tog, (k1,p1) 5 times, yon, k2tog, […]
  2006, Heather Dixon, Not Your Mama's Knitting, page 222