| Noun | 1. | concentration - the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)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 | |
| 2. | concentration - the spatial property of being crowded togetherbits per inch, bpi - a measure of how densely information is packed on a storage medium | |
| 3. | concentration - strengthening the concentration (as of a solute in a mixture) by removing extraneous materialpervaporation - 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 dilution - weakening (reducing the concentration) by the addition of water or a thinner | |
| 4. | concentration - increase in densityincrease - a change resulting in an increase; "the increase is scheduled for next month" rarefaction - a decrease in the density of something; "a sound wave causes periodic rarefactions in its medium" | |
| 5. | concentration - complete attention; intense mental effortattention - the faculty or power of mental concentration; "keeping track of all the details requires your complete attention" 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" | |
| 6. | concentration - bringing together military forces | |
| 7. | concentration - great and constant diligence and attentionindustriousness, diligence, industry - persevering determination to perform a task; "his diligence won him quick promotions"; "frugality and industry are still regarded as virtues" singleness - the quality of concentrating on one central objective; "his singleness of purpose" | |