Black's Law Dictionary (2nd edition)dictionaries

Non Infregit Conventionem

Lat He did not break the contract The name of a plea sometimes pleaded in the action of covenant, and intended as a general issue, but held to be a had plea; there being, properly speaking, no general issue in that action. 1 Tidd, Pr. 356.

Source: Black’s Law Dictionary 2nd Ed (1910)