Definition of side-coat in US English:

side-coat

noun

English Regional, North Midland, Scottish, Northern
historical
  • 1A long coat; a greatcoat.

  • 2A long garment worn by children; (also) a long garment traditionally worn by a jester, court fool, etc. Frequently in plural Compare longcoat. Now historical and rare.

Origin

Late Middle English; earliest use found in The Wycliffite Bible (early version). From side + coat.

Pronunciation

side-coat

/ˈsʌɪdkəʊt/