concentration

US /ˌkɑːn.sənˈtreɪ.ʃən/
UK /ˌkɑːn.sənˈtreɪ.ʃən/
"concentration" picture
1.

the action or power of focusing one's attention or mental effort

:
•
He needs to improve his concentration during studies.
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Loud noises can disrupt your concentration.
:
focusattentionabsorptionengrossmentpreoccupation
2.

the amount of a substance in a given volume or area

:
•
The high concentration of salt in the water made it undrinkable.
•
The air pollution concentration has reached dangerous levels.
:
densitystrengthrichnesspotency
3.

a mass or collection of something

:
•
There was a large concentration of troops near the border.
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The city has a high concentration of tech companies.
:
clustergroupingmassaccumulationaggregation
:
concentrateconcentricgood concentration power