Definition of torrefy in English:

torrefy

verb

[with object]technical
  • Roast, scorch, or dry (a substance such as an ore, a drug, or a fuel) with heat to drive off all moisture or impurities.

    ‘torrefying wood loses 30% of the mass but only 10% of the energy’

Origin

Early 17th century: from French torréfier, from Latin torrefacere ‘dry by heat’, from torrere ‘parch, scorch’.

Pronunciation

torrefy

/ˈtɒrɪfʌɪ/