concentration

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.

Definitions of concentration
  1. noun
    the spatial property of being crowded together
    synonyms: compactness, denseness, density, tightness
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    Antonyms:
    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
  2. noun
    an increase in density
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    types:
    compaction, compression, concretion, densification
    an increase in the density of something
    rarefaction
    a decrease in the density of something
    type of:
    increase
    a change resulting in an increase
  3. noun
    the strength of a solution; number of molecules of a substance in a given volume
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    types:
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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:
    property
    a basic or essential attribute shared by all members of a class
  4. noun
    strengthening the concentration (as of a solute in a mixture) by removing diluting material
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    Antonyms:
    dilution
    weakening (reducing the concentration) by the addition of water or a thinner
    types:
    pervaporation
    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:
    fortification, strengthening
    the act of increasing the strength of something
  5. noun
    bringing together military forces
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    type of:
    assemblage, assembly, gathering
    the social act of assembling
  6. noun
    complete attention; intense mental effort
    synonyms: absorption, engrossment, immersion
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    types:
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    centering, direction, focal point, focus, focusing, focussing
    the concentration of attention or energy on something
    specialism
    the concentration of your efforts on a particular field of study or occupation
    study
    a state of deep mental absorption
    particularism
    a focus on something particular
    type of:
    attention
    the faculty or power of mental concentration
  7. noun
    great and constant diligence and attention
    synonyms: assiduity, assiduousness
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    types:
    engrossment, intentness
    the quality of being intent and concentrated
    singleness
    the quality of concentrating on one central objective
    type of:
    diligence, industriousness, industry
    persevering determination to perform a task
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