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1.
(chemistry) the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)
2.
the spatial property of being crowded together
3.
strengthening the amount of a substance in a unit amount of another substance (as of a solute in a mixture) by removing the other substance
4.
increase in density
5.
complete attention; intense mental effort
6.
bringing together military forces
7.
great and constant diligence and attention
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