concentration

Definition
(noun) the strength of a solution; number of molecules of a substance in a given volume Definition
(noun) the spatial property of being crowded together Definition
(noun) strengthening the concentration (as of a solute in a mixture) by removing diluting material Definition
(noun) increase in density Definition
(noun) complete attention; intense mental effort Definition
(noun) bringing together military forces Definition
(noun) great and constant diligence and attention