Definition of stiffening in English:

stiffening

noun

mass noun
  • Material used to stiffen a garment, fabric, or other object.

    • ‘We usually only find it necessary or helpful to apply stiffening for brief periods, typically for no more than 5% of insertion time.’
    • ‘When required, he will apply stiffening and restore the color of the seams.’

Pronunciation

stiffening

/ˈstɪfnɪŋ/