Meaning of unperforming in English:

unperforming

Pronunciation /ˌʌnpəˈfɔːmɪŋ/

adjective

  • That is not performing or being performed; (now) especially not functioning well or to the expected standard; (Finance) = non-performing .

Origin

Mid 17th century; earliest use found in Daniel Pell (fl. 1659). From un- + performing.