Law lexicon
Misdemeanor - A criminal offense lesser than a felony and generally punishable by fine or by imprisonment other than in a penitentiary.
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Misfeasance - Improper performance of an act which a person might lawfully do.
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Mistrial - An invalid trial, caused by fundamental error. When a mistrial is declared, the trial must start again from the selection of the jury.
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Mitigating circumstances - Those which do not constitute a justification or excuse for an offense but which may be considered as reasons for reducing the degree of blame.
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Mittimus - The name of an order in writing, issuing from a court and directing the sheriff or other officer to convey a person to a prison, asylum, or reformatory, and directing the jailer or other appropriate official to receive and safely keep the person until his or her fate shall be determined by due course of law.
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Moot - A moot case or a moot point is one not subject to a judicial determination because it involves an abstract question or a pretended controversy that has not yet actually arisen or has already passed. Mootness usually refers to a court's refusal to consider a case because the issue involved has been resolved prior to the court's decision, leaving nothing that would be affected by the court's decision.
Source: Jurist International.