definition of
concentration

[1] #1 concentration n. the strength of a solution; number of molecules of a substance in a given volume. wn

[2] #2 concentration n. [density, denseness, tightness, compactness] the spatial property of being crowded together. wn

[3] #3 concentration n. strengthening the concentration (as of a solute in a mixture) by removing diluting material. wn

[4] #4 concentration n. increase in density. wn

[5] #5 concentration n. [engrossment, absorption, immersion] complete attention; intense mental effort. wn