Definition of on-ding in US English:

on-ding

(also onding, ondin')

noun

English Regional, Scottish, Northern
  • 1A heavy fall of rain or snow, a downpour; persistent heavy rain or snow.

  • 2Figurative. An onslaught, an onset; a noisy outburst.

Origin

Late 18th century. From on- + ding.

Pronunciation

on-ding

/ˈɒndɪŋ/