Webster
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Webster’s Revised Unabridged Dictionary · 1913

Concentrate

Con·cen′trate, v. t. [imp. & p. p. Concentrated; p. pr. & vb. n. Concentrating.] [Pref. con- + L. centrum center. Cf. Concenter.] 1. To bring to, or direct toward, a common center; to unite more closely; to gather into one body, mass, or force; to fix; as, to concentrate rays of light into a focus; to concentrate the attention.

(He) concentrated whole force at his own camp. Motley.

2. To increase the strength and diminish the bulk of, as of a liquid or an ore; to intensify, by getting rid of useless material; to condense; as, to concentrate acid by evaporation; to concentrate by washing; — opposed to dilute.

Spirit of vinegar concentrated and reduced to its greatest strength. Arbuthnot.

Syn. — To combine; to condense; to consolidate.

Con·cen′trate, v. i. To approach or meet in a common center; to consolidate; as, population tends to concentrate in cities.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.