assumpsit noun. [ǝ'sʌm(p)sɪt] L16.
[Latin, lit. 'he has taken upon himself', 3 perf. indic. sing. of assumere ASSUME.]
1. An undertaking. L16.

2. spec. in Law (now Hist.). A promise or contract, oral or in writing not sealed, founded upon a consideration. Also (more fully action of assumpsit), an action to recover damages for breach or non-performance of such a contract. M17.

[TahlilGaran] English Dictionary ▲