n. The state of being competent; fitness; suitableness; adequateness: as, there is no doubt of his competence for the task.n. Adequate authority or qualification; range of capacity or ability; the sphere of action or judgment within which one is competent.n. In the law of evidence: Legal capacity or fitness to be heard in court, as distinguished from credibility or sufficiency, because the question whether the evidence shall be heard is usually determined before considering its weight.n. Legal right or authority; power or capacity to take cognizance of a cause: as, the competency of a judge or court to examine and decide.n. Sufficiency; such a quantity as is sufficient; especially, property, means of subsistence, or income sufficient to furnish the necessaries and conveniences of life, without superfluity.n. In physical geography, the ability of a stream to transport the amount of land waste that is brought into it.