| concentration | | |
| n. (attribute) | 1. concentration | the strength of a solution; number of molecules of a substance in a given volume. |
| ~ property | a basic or essential attribute shared by all members of a class.; "a study of the physical properties of atomic particles" |
| ~ 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. |
| ~ molar concentration, molarity, m | concentration measured by the number of moles of solute per liter of solution. |
| n. (attribute) | 2. compactness, concentration, denseness, density, tightness | the spatial property of being crowded together. |
| ~ spatial arrangement, spacing | the property possessed by an array of things that have space between them. |
| n. (act) | 3. concentration | strengthening the concentration (as of a solute in a mixture) by removing diluting material. |
| ~ strengthening | the act of increasing the strength of something. |
| ~ 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. |
| n. (event) | 4. concentration | increase in density. |
| ~ increase | a change resulting in an increase.; "the increase is scheduled for next month" |
| ~ compaction, compression, densification, concretion | an increase in the density of something. |
| ~ rarefaction | a decrease in the density of something.; "a sound wave causes periodic rarefactions in its medium" |
| n. (cognition) | 5. absorption, concentration, engrossment, immersion | complete attention; intense mental effort. |
| ~ attention | the faculty or power of mental concentration.; "keeping track of all the details requires your complete attention" |
| ~ centering, focus, focusing, focussing, focal point, direction | the concentration of attention or energy on something.; "the focus of activity shifted to molecular biology"; "he had no direction in his life" |
| ~ specialism | the concentration of your efforts on a particular field of study or occupation. |
| ~ study | a state of deep mental absorption.; "she is in a deep study" |
| n. (act) | 6. concentration | bringing together military forces. |
| ~ gathering, assemblage, assembly | the social act of assembling.; "they demanded the right of assembly" |
| n. (attribute) | 7. assiduity, assiduousness, concentration | great and constant diligence and attention. |
| ~ industriousness, diligence, industry | persevering determination to perform a task.; "his diligence won him quick promotions"; "frugality and industry are still regarded as virtues" |
| ~ intentness, engrossment | the quality of being intent and concentrated.; "the intentness of his gaze" |
| ~ singleness | the quality of concentrating on one central objective.; "his singleness of purpose" |
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