Definition of proofing in English:

proofing

noun

mass noun
  • 1The process of making a proof of a printed work, engraving, etc.

    ‘proofing could be done on a low-cost printer’
    1. 1.1 The process of proofreading a text.
      ‘she did the proofing and editing’

Pronunciation

proofing

/ˈpruːfɪŋ/