noun The belief of something based upon reasonable evidence, or upon something known to be true.
The presumption is that an event has taken place.
noun The condition upon which something is presumed.
noun Arrogant behaviour; the act of venturing beyond due bounds of reverence or respect.
noun An inference that a trier of fact is either permitted or required to draw under certain factual circumstances (as prescribed by statute or case law) unless the party against whom the inference is drawn is able to rebut it with admissible, competent evidence.