concentration

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

concentration, attention

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

:
He needs to improve his concentration during studies.
Il doit améliorer sa concentration pendant ses études.
Loud noises can disrupt your concentration.
Les bruits forts peuvent perturber votre concentration.
2.

concentration, densité

the amount of a substance in a given volume or area

:
The high concentration of salt in the water made it undrinkable.
La forte concentration de sel dans l'eau la rendait imbuvable.
The air pollution concentration has reached dangerous levels.
La concentration de la pollution atmosphérique a atteint des niveaux dangereux.
3.

concentration, regroupement

a mass or collection of something

:
There was a large concentration of troops near the border.
Il y avait une forte concentration de troupes près de la frontière.
The city has a high concentration of tech companies.
La ville a une forte concentration d'entreprises technologiques.