Covers a wide range of behaviour of an offensive nature. It is commonly understood to be behaviour intended to disturb, threaten or upset, and it is characteristically repetitive.

A violation of a statute, regulation or ordinance, which may be criminal or merely not in conformity; that which lacks authority of or support from the law.

Any matter of fact that a party to a claim or action offers to provide to prove or disprove an issue in the case. The strongest type of evidence is that which provides direct proof of the truth of an assertion. At the other extreme is evidence that is merely consistent with an assertion but does not rule out other, contradictory assertions, and may be viewed as circumstantial evidence.

Damaging the reputation of a person or a group of people by publishing or saying bad things about them that are not true. More specifically, saying words which amount to defamation is slander and defamation in other forms, such as printed words or images, is libel.

Sometimes known as a repudiatory breach, is a breach of an essential part of a contract that it permits the distressed party to terminate performance of the contract, in addition to entitling that party to sue for damages.

A breach of contract that is so fundamental that it permits the injured party to terminate the performance of the contract, in addition to entitling that party to sue for damages.

Significant enough substantial failure in the performance of a contract, as to give the affected party the right to sue for damages as well as release the aggrieved party from its obligations.