1 (also treated as sing.) the abstract science of number, quantity, and space studied in its own right (pure mathematics), or as applied to other disciplines such as physics, engineering, etc. (applied mathematics).
2 (as pl.) the use of mathematics in calculation etc.
Derivatives:
mathematician n.
Etymology: prob. f. F matheacutematiques pl. f. L mathematica f. Gk mathematika: see MATHEMATICAL
Useful english dictionary. 2012.