Definition of concentration:
engrossment, block, doctoral, parsimoniousness, assembly, submersion, meanness, absorption, compactness, audience, cascade, dispersal, day school, edge, tightness, assiduity, miscellany, assessment, immersion, dousing, complex, minginess, arithmetic, combination, crash course, balance, submergence, niggardliness, course, dumbness, batch, apprenticeship, bonanza, stringency, amount, introspection, bombardment, deluge, separation, fixing, feast, herd, niggardness, excite, collection, accumulation, flock, party, group, soul-searching, crowd, concourse, assimilation, band, ducking, parsimony, class, avalanche, backlog, mass, array, congregation, company, closeness, density, articles, confluence, forethought, denseness, army, consolidation, enthrallment, correspondence course, preoccupancy, allowance, capacity, cornucopia, ed., gathering, tautness, constriction, blizzard, tightfistedness, submerging, conflux, slow-wittedness, soaking up, assiduousness, ingress, allocation.
- convergence (part of speech: noun)
- attention (part of speech: noun)
- decrease (part of speech: noun)
- density (part of speech: noun)
thought (part of speech: noun)
- brain work,
And that was all, unless he disturbed Sylvia, seated at cards with Quarrier and Major Belwether and Leila Mortimer- and very intent on the dummy, very still, and a trifle pallid with the pallor of concentration.- "The Fighting Chance", Robert W. Chambers.
- "The Isle of Unrest", Henry Seton Merriman.
- "Space Platform", Murray Leinster.