Source : Webster's Revised Unabridged Dictionary (1913)

Malthusianism \Mal*thu"sian*ism\, n.
   The system of Malthusian doctrines relating to population.

Source : WordNet®

Malthusianism
     n : Malthus' theory that population increase would outpace
         increases in the means of subsistence [syn: {Malthusian
         theory}]