n. | 1. | The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration. |
2. | The act or process of reducing the volume of a liquid, as by evaporation. | |
3. | (Metal.) The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water. |
Noun | 1. | concentration - the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter) |
2. | concentration - the spatial property of being crowded together Antonyms: dispersion, distribution - the spatial property of being scattered about over an area or volume | |
3. | concentration - strengthening the concentration (as of a solute in a mixture) by removing extraneous material Antonyms: dilution - weakening (reducing the concentration) by the addition of water or a thinner | |
4. | concentration - increase in density | |
5. | concentration - complete attention; intense mental effort | |
6. | concentration - bringing together military forces | |
7. | concentration - great and constant diligence and attention Synonyms: assiduity, assiduousness |