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To direct or draw toward a common center; focus.
(verb-transitive)
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To bring into one main body: Authority was concentrated in the president.
(verb-transitive)
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To make (a solution or mixture) less dilute.
(verb-transitive)
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To converge toward or meet in a common center.
(verb-intransitive)
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To increase by degree; gather: "Dusk began to concentrate into full night” ( Anthony Hyde).
(verb-intransitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.