v. & n.
--v.
1. intr. (often foll. by on, upon) focus all one's attention or mental ability.
2 tr. bring together (troops, power, attention, etc.) to one point; focus.
3 tr. increase the strength of (a liquid etc.) by removing water or any other diluting agent.
4 tr. (as concentrated adj.) (of hate etc.) intense, strong.
--n.
1. a concentrated substance.
2 a concentrated form of esp. food.
Derivatives:
concentratedly adv. concentrative adj. concentrator n.
Etymology: after concentre f. F concentrer (as con- + centre)