Case law
The entire collection of published legal decisions of the courts which, because of stare decisis , contributes a large part of the legal rules which apply in modern society. If a rule of law cannot be found in written laws, lawyers will often say that it is a rule to be found in "case law". In other words, the rule is not in the statute books but can be found as a principle of law established by a judge in some recorded case. The word jurisprudence has become synonymous for case law.

Citation
An order of a court to either do a certain thing or to appear before it to answer charges. The citation is typically used for lesser offences (such as traffic violations) because it relies on the good faith of the defendant to appear as requested, as opposed to an arrest or bail . The penalty for failing to obey a citation is often a warrant for the arrest of the defendant.

Client-solicitor privilege
A right that belongs to the client of a lawyer that the latter keep any information or words spoken to him during the provision of the legal services to that client, strictly confidential. This includes being shielded from testimony before a court of law. The client may, expressly or impliedly, waive the privilege and, exceptionally, it may also be waived by the lawyer if the disclosure of the information may prevent a serious crime.

Conviction
The formal decision of a criminal trial which finds the accused guilty. It is the finding of a judge or jury, on behalf of the state, that a person has, beyond reasonable doubt, committed the crime for which he, or she, has been accused. It is the ultimate goal of the prosecution and the result resisted by the defense. Once convicted, an accused may then be sentenced.

Costs
This is a term often used in judgments as in "the defendant will pay costs." When a person is condemned to "costs" it means that he has to pay all the court costs such as the fees for bringing the action, witness fees and other fees paid out by the other side in bringing the action to justice. A court can also condemn a losing party to "special costs" but this is considered punitive as it would include the other side's lawyer bill. The rule in most places is that "costs follows the event" which means that the loser pays. In most states, the court has the final say on costs and may decide not to make an order on costs.

Cross-examination
In trials, each party calls witnesses. Each party may also question the other's witness(es). When you ask questions of the other party's witness(es), it is called a "cross-examination" and you are allowed considerably more latitude in cross-examination then when you question your own witnesses (called an " examination-in-chief "). For example, you are not allowed to ask leading questions to your own witness whereas you can in cross-examination.

Crown
The word refers specifically to the British Monarch, where she is the head of state of Commonwealth countries. Prosecutions and civil cases taken (or defended) by the government are taken in the name of the Crown as head of state. That is why public prosecutors are referred to, in Canada, as "Crown" prosecutors and criminal cases take the form of "The Crown vs. John Doe" or "Regina vs. John Doe", Regina being Latin for "The Queen."