Define molar conductivity ${\mathrm{\Lambda }}_{\mathrm{m}}$ and how is it related to conductivity (k) ?

Conductivity of an electrolytic conductor containing 1 gr.mole of the electrolyte which is taken in between two long electrodes that are 1cm apart is called molar conductivity (k).
${\mathrm{\Lambda }}_{\mathrm{m}}=\frac{\mathrm{k}\times 1000}{\mathrm{M}}$
Units : S cm² mol^-1