n. The act of presuming, or taking upon one's self more than good sense and propriety warrant; excessive boldness or over-confidence in thought or conduct; presumptuousness; assurance; arrogance.n. The act of presuming or probably inferring; hypothetical or inductive inference.n. That which is presumed; that which is supposed to be true upon grounds of probability.n. A ground for presuming or believing; evidence or probability, as tending to establish an opinion.n. In law, an inference as to the existence of one fact from the existence of some other fact, founded upon a previous experience of their connection, or dictated by the policy of the law.n. Surmise, Conjecture, etc. See inference.n. Likelihood, probability.