Definitions: (noun) Concentration is the ability to focus your attention on something. (noun) A concentration is a large amount of something in one place or group.
Examples: (noun) The government’s concentration should be on helping those in the greatest need. (noun) A clean desk in a quiet place will help students improve concentration. (noun) The growing concentration of people in cities is causing new problems. (noun) The oil-sands in Alberta, Canada, contain high concentrations of oil.
Synonyms: nouns: combination, amount. focus, attention.
Academic Word List Sublist and Group: 4 B