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3 VERB If you conceive a plan or idea, you think of it and work out how it can be done. □ [V n] She had conceived the idea of a series of novels. □ [V + of ] He conceived of the first truly portable computer in 1968.

4 VERB When a woman conceives , she becomes pregnant. □ [V ] Women, he says, should give up alcohol before they plan to conceive. □ [V n] A mother who already has non-identical twins is more likely to conceive another set of twins.

con|cen|trate ◆◇◇ /kɒ ns ^ə ntre I t/ (concentrates , concentrating , concentrated )

1 VERB If you concentrate on something, or concentrate your mind on it, you give all your attention to it. □ [V + on ] It was up to him to concentrate on his studies and make something of himself. □ [V ] At work you need to be able to concentrate. □ [V n + on ] This helps you to be aware of time and concentrates your mind on the immediate task.

2 VERB [usu passive] If something is concentrated in an area, it is all there rather than being spread around. □ [be V -ed + in ] Most development has been concentrated in and around cities. [Also be V -ed adv]

3 N‑VAR Concentrate is a liquid or substance from which water has been removed in order to make it stronger, or to make it easier to store. □  …orange juice made from concentrate.

4 PHRASE If you say that an unpleasant fact or situation concentrates someone's mind , you mean that it makes them think clearly, because they are aware of the serious consequences if they do not. □  A term in prison will concentrate his mind wonderfully. SYNONYMS concentrate VERB 1

pay attention:I didn't pay any attention at first.

con|cen|trat|ed /kɒ ns ^ə ntre I t I d/

1 ADJ A concentrated liquid has been increased in strength by having water removed from it. □  Sweeten dishes sparingly with honey, or concentrated apple or pear juice.

2 ADJ [usu ADJ n] A concentrated activity is directed with great intensity in one place. □  …a more concentrated effort to reach out to troubled kids.

con|cen|tra|tion ◆◇◇ /kɒ ns ^ə ntre I ʃ ^ə n/ (concentrations )

1 N‑UNCOUNT Concentration on something involves giving all your attention to it. □  Neal kept interrupting, breaking my concentration. □  We lacked concentration and it cost us the goal and the game.

2 N‑VAR A concentration of something is a large amount of it or large numbers of it in a small area. □ [+ of ] The area has one of the world's greatest concentrations of wildlife. □ [+ of ] There's been too much concentration of power in the hands of central authorities.

3 N‑VAR [n N ] The concentration of a substance is the proportion of essential ingredients or substances in it. □ [+ of ] pH is a measure of the concentration of free hydrogen atoms in a solution.

co n|cen|tra |tion camp (concentration camps ) N‑COUNT A concentration camp is a prison in which large numbers of ordinary people are kept in very bad conditions, usually during a war.

con|cen|tric /kənse ntr I k/ ADJ [ADJ n] Concentric circles or rings have the same centre. □  On a blackboard, he drew five concentric circles.

con|cept ◆◇◇ /kɒ nsept/ (concepts ) N‑COUNT A concept is an idea or abstract principle. □ [+ of ] She added that the concept of arranged marriages is misunderstood in the west.

con|cep|tion /kənse pʃ ^ə n/ (conceptions )