- intense mental application; complete attention
- the act or process of concentrating
- something that is concentrated
- the strength of a solution, esp the amount of dissolved substance in a given volume of solvent, usually expressed in moles per cubic metre or cubic decimetre (litre)
- the act of bringing together military forces
- the application of fire from a number of weapons against a target
WordReference Random House Learner's Dictionary of American English © 2026
con•cen•tra•tion /ˌkɑnsənˈtreɪʃən/USA pronunciation
n. the bringing to a single point: [uncountable]The party worked for the concentration of power in the hands of the few.[countable]large concentrations of immigrants.
WordReference Random House Unabridged Dictionary of American English © 2026- [uncountable] the directing of one's efforts to one point:will need all her concentration to perform a triple toe jump.
con•cen•tra•tion
(kon′sən trā′shən),USA pronunciation n.
- the act of concentrating;
the state of being concentrated. - exclusive attention to one object;
close mental application. - something concentrated:a concentration of stars.
- [Mil.]
- the assembling of military or naval forces in a particular area in preparation for further operations.
- a specified intensity and duration of artillery fire placed on a small area.
- the focusing of a student's academic program on advanced study in a specific subject or field.
- Chemistry(in a solution) a measure of the amount of dissolved substance contained per unit of volume.
- Also called memory. [Cards.]a game in which all 52 cards are spread out face down on the table and each player in turn exposes two cards at a time and replaces them face down if they do not constitute a pair, the object being to take the most pairs by remembering the location of the cards previously exposed.
- concentr(ic) + -ation 1625–35
Collins Concise English Dictionary © HarperCollins Publishers::
concentration /ˌkɒnsənˈtreɪʃən/ n