Source : Webster's Revised Unabridged Dictionary (1913)

Monogamy \Mo*nog"a*my\, n. [L. monogamia, Gr. ?: cf. F.
   monogamie.]
   1. Single marriage; marriage with but one person, husband or
      wife, at the same time; -- opposed to {polygamy}. Also,
      one marriage only during life; -- opposed to
      {deuterogamy}.

   2. (Zo["o]l.) State of being paired with a single mate.

Source : WordNet®

monogamy
     n : having only one spouse at a time [syn: {monogamousness}]