D defs.my
Entry 3 senses · 2 variants Webster, 1913

Concentrate

/kän'-sən-trātˌ/ · Con·cen·trate · IPA /ˈkɑn.sən.tɹeɪt/
01 v. t. 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 …
imp. & p. p. Concentrated; p. pr. & vb. n. Concentrating
  1. 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. 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.
02 v. i. To approach or meet in a common center; to consolidate; as, population tends to concentrate in cities.
  1. 1.
    To approach or meet in a common center; to consolidate; as, population tends to concentrate in cities.