Definition of non assumpsit in English:

non assumpsit

noun

Law
historical
  • A plea in an action of assumpsit by which the defendant denies having made any promise or undertaking.

Origin

Mid 17th century. From post-classical Latin non assumpsit he did not undertake from classical Latin nōn not + assūmpsit he undertook, 3rd singular perfect indicative of assūmere.

Pronunciation

non assumpsit

/ˌnɒn əˈsʌm(p)sɪt/