1. to bring or draw to a common center or point of union;converge; direct toward one point; focus: to concentrate one'sattention on a problem; to concentrate the rays of the sun with a lens.
2. to put or bring into a single place, group, etc.: The nation'swealth had been concentrated in a few families.
3. to intensify; make denser, stronger, or purer, especially bythe removal or reduction of liquid: to concentrate fruit juice; toconcentrate a sauce by boiling it down.
4. Mining . to separate (metal or ore) from rock, sand, etc., soas to improve the quality of the valuable portion.
5.to bring all efforts, faculties, activities, etc., to bear on onething or activity (often followed by on or upon ): toconcentrate on solving a problem.
6. to come to or toward a common center; converge; collect:The population concentrated in one part
of the city.
7. to become more intense, stronger, or purer.
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