The observation, identification, description, experimental investigation, and theoretical explanation of phenomena. Such activities restricted to a class of natural phenomena. Such activities applied to an object of inquiry or study. Methodological activity, discipline, or study: I've got thermonuclear activity down to a science. An activity that appears to require study and method: the science of wasting time. Any branch or department of systematized knowledge considered as a distinct field of investigation or object of study; as, the science of astronomy, of chemistry, or of mind. The ancients reckoned seven sciences, namely, grammar, rhetoric, logic, arithmetic, music, geometry, and astronomy; -- the first three being included in the Trivium, the remaining four in the Quadrivium. ``In science, scimus ut sciamus; in art, scimus ut producamus. And, therefore, science and art may be said to be investigations of truth; but one, science, inquires for the sake of knowledge; the other, art, for the sake of production; and hence science is more concerned with the higher truths, art with the lower; and science never is engaged, as art is, in productive application. And the most perfect state of science, therefore, will be the most high and accurate inquiry; the perfection of art will be the most apt and efficient.    ...dictionary.com