Basicity n. : The quality or state of being a base.

Basicity n. : The power of an acid to unite with one or more atoms or equivalents of a base, as indicated by the number of replaceable hydrogen atoms contained in the acid.

Example:
why is there a huge drop in Basicity of trimethylamine compared to methylamine and dimethylamine?

Taxonomy
H3O, acids, substances, hydroxides, concentration, ions, chemistry, H2O, chemical compound, reaction, alkali metals, NaOH, free encyclopedia, acids and bases, salts, definitions, heterogeneous catalysts, measure.

Defination from the web:
... The base dissociation constant or Kb is a measure of basicity. pKb is the negative log of Kb and related to the pKa by the simple relationship pKa + pKb = 14. ...