concentration.html - 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.

concentratedly adv. concentrative adj. concentrator n. [after concentre f. F concentrer (as con- + centre)]

concentration.html - n.
1 a the act or power of concentrating (needs to develop concentration). b an instance of this (interrupted my concentration).
2 something concentrated (a concentration of resources).
3 something brought together; a gathering.
4 the weight of substance in a given weight or volume of material.

concentration camp a camp for the detention of political prisoners, internees, etc., esp. in Nazi Germany.

concentration.html - v.tr. &
intr. (US concenter) bring or come to a common centre. [F concentrer: see concentrate]

concentration.html - adj.
(often foll. by with) (esp. of circles) having a common centre (cf. eccentric).

concentrically adv. concentricity n. [ME f. OF concentrique or med.L concentricus (as com-, centricus as centre)]

concentration.html - v.tr.
1 (often foll. by from) keep secret (concealed her motive from him).
2 not allow to be seen; hide (concealed the letter in her pocket).

concealer n. concealment n. [ME f. OF conceler f. L concelare (as com-, celare hide)]

concentration.html - v.tr.
1 a (often foll. by that + clause) admit (a defeat etc.) to be true (conceded that his work was inadequate). b admit defeat in.
2 (often foll. by to) grant, yield, or surrender (a right, a privilege, points or a start in a game, etc.).
3 Sport allow an opponent to score (a goal) or to win (a match), etc.

conceder n. [F conc

der or L concedere concess- (as com-, cedere yield)]