Legal Definition of impracticability
1 : the state of being impracticable
2 : a doctrine in contract law: relief from obligations under a contract may be granted when performance has been rendered excessively difficult, expensive, or harmful by an unforeseen contingency; also : a defense to breach of contract on the ground that it has been rendered impracticable —called also commercial impracticability, impracticability of performance — compare frustration, impossibility of performance at impossibility Editor's note: Under section 2-615 of the Uniform Commercial Code, the impracticability must arise “by the occurrence of a contingency the non-occurrence of which was a basic assumption on which the contract was made” or by compliance with the law.
3 : excessive difficulty in carrying out a procedure (as joinder)
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