Definitions of concentrate:

• noun:   a concentrated example

  Example: "The concentrate of contemporary despair"

• noun:   a concentrated form of a foodstuff; the bulk is reduced by removing water
• noun:   the desired mineral that is left after impurities have been removed from mined ore
• verb:   make (the solvent of a solution) dense or denser
• verb:   direct one's attention on something
• verb:   draw together or meet in one common center

  Example: "These groups concentrate in the inner cities"

• verb:   compress or concentrate
• verb:   cook until very little liquid is left
• verb:   make more concise
• verb:   make central
• verb:   be cooked until very little liquid is left