Definition of "Scotch" :

noun: whiskey distilled in Scotland; especially whiskey made from malted barley in a pot still

noun: a slight surface cut (especially a notch that is made to keep a tally)

verb: make a small cut or score into

verb: hinder or prevent (the efforts, plans, or desires) of

adjective: avoiding waste

"Scotch' is used only informally."

adjective: of or relating to or characteristic of Scotland or its people or culture or its English dialect or Gaelic language

"Scotch' is in disfavor with Scottish people and is used primarily outside Scotland except in such frozen phrases as Scotch broth' or Scotch whiskey' or Scotch plaid'."