Dictionary

A substance that is in a condensed form.

To bring to, or direct toward, a common center; to unite more closely; to gather into one body, mass, or force.

Example: to concentrate rays of light into a focus

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.

Example: to concentrate acid by evaporation

To approach or meet in a common center; to consolidate.

Example: Population tends to concentrate in cities.

To focus one's thought or attention (on).

Example: Let me concentrate!