If you have great powers of concentration, that means you're able to focus all your attention on the matter at hand. Concentration can also refer to something that's clustered together or to the density or strength of a solution.

A concentration of people means that there are many of them in one area. Your city may have a concentration of artists living in the warehouses by the river. A high concentration of a substance in a solution means that there's a lot of it relative to the volume: the Great Salt Lake has very few fish because of the high concentration of salt. To say that you have good concentration skills means that you pay attention well.

Primary Meanings of concentration

the spatial property of being crowded together
complete attention; intense mental effort
Full Definitions of concentration

n the spatial property of being crowded together

compactness, denseness, density, tightness
dispersion, distribution
the spatial or geographic property of being scattered about over a range, area, or volume
Type of:
spacing, spatial arrangement
the property possessed by an array of things that have space between them

n an increase in density

compaction, compression, concretion, densification
an increase in the density of something
a decrease in the density of something
Type of:
a change resulting in an increase

n the strength of a solution; number of molecules of a substance in a given volume

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titer, titre
the concentration of a solution as determined by titration
hydrogen ion concentration
the number of moles of hydrogen ions per cubic decimeter
molal concentration, molality
concentration measured by the number of moles of solute per kilogram of solvent
M, molar concentration, molarity
concentration measured by the number of moles of solute per liter of solution
pH, pH scale
(from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);
Type of:
a basic or essential attribute shared by all members of a class

n strengthening the concentration (as of a solute in a mixture) by removing diluting material

weakening (reducing the concentration) by the addition of water or a thinner
the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off
Type of:
the act of increasing the strength of something

n bringing together military forces

Type of:
assemblage, assembly, gathering
the social act of assembling

n complete attention; intense mental effort

absorption, engrossment, immersion
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centering, direction, focal point, focus, focusing, focussing
the concentration of attention or energy on something
the concentration of your efforts on a particular field of study or occupation
a state of deep mental absorption
a focus on something particular
Type of:
the faculty or power of mental concentration

n great and constant diligence and attention

assiduity, assiduousness
engrossment, intentness
the quality of being intent and concentrated
the quality of concentrating on one central objective
Type of:
diligence, industriousness, industry
persevering determination to perform a task

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