concentration.

1. The sustained direction of attention toward a task or object.

2. The accumulation of people, resources, or power in a limited area or group.

3. The amount of a substance present in a specified quantity of a mixture.

Use it for

Words that belong together

• intense concentration
• sustained concentration

On the page

The intricate comparison required sustained concentration.

Usage notes

Primary category: academic / formal. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: analysis, explanation, qualification. Commonness: moderately common.