n. The act of calculating; the art, practice, or manner of computing by numbers; reckoning; computation: as, to find a result by calculation; the calculation was a difficult one.n. A series of arithmetical processes leading to a certain result.n. An estimate formed in the mind by comparing the various circumstances and facts which bear on the matter in hand.n. The habit of forming mental estimates; a trait or an element of intellectual character which shows itself in the habit of formulating and revolving schemes in the mind, or forecasting the progress or results of an undertaking.n. Synonyms Deliberation, circumspection, wariness, forethought, prudence.