su·preme / səˈprēm; soō-/ • adj. (of authority or an office, or someone holding it) superior to all others: a unified force with a supreme commander. ∎  strongest, most important, or most powerful: on the racetrack he reigned supreme. ∎  very great or intense; extreme: he was nerving himself for a supreme effort. ∎  (of a penalty or sacrifice) involving death: our comrades who made the supreme sacrifice. ∎  used to indicate that someone or something is very good at or well known for a specified activity: here was the gift supreme.• n. (also su·prême) a rich cream sauce. ∎  a dish served in such a sauce: chicken supreme.PHRASES: the Supreme Being a name for God.DERIVATIVES: su·preme·ly adv.

supreme
A. (poet.) loftiest, topmost;

B. highest in authority or rank; of the highest quality or degree. XVI. — L. suprēmus, f. suprā; see prec. and cf. EXTREME.

Hence supremacy XVI.

suprême French; the best or most delicate part. Also white sauce made with reduced chicken stock, cream, butter, or egg yolk.