n. 1
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.
n. 2
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated. The direction of attention to a specific object.
n. 3
The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated. The act, process or product of reducing the volume of a liquid, as by evaporation.

Related words

Phrases: concentration camp concentration time molal concentration molar concentration time of concentration concentration deficit disorder

Forms

Plural: concentrations → densities, compactnesses, tightnesses, densenesses…

density There is a high density of giraffes in this area.
tightness I felt an uncomfortable tightness in my chest.
compactness The selling point of cup ramen is its compactness, which makes it easy to carry.
absorption Could you explain how food absorption takes place?
immersion Orthodox Christians prefer to baptize by immersion.

Use in printed books, per decade from 1850 to 2019.

4 letters: mind¹
5 letters: study²
7 letters: density³
9 letters: intensity⁴, immersion³, tightness², denseness, assiduity, pelmanism
10 letters: absorption³
11 letters: compactness³, engrossment³
12 letters: condensation⁴
13 letters: consolidation⁵, assiduousness
14 letters: centralization⁵, centralisation

The small number after each word is its number of syllables (study² = 2 syllables).