Source : Webster's Revised Unabridged Dictionary (1913)

Nonintervention \Non*in`ter*ven"tion\, n.
   The state or habit of not intervening or interfering; as, the
   nonintervention of one state in the affairs of another.

Source : WordNet®

nonintervention
     n : a foreign policy of staying out of other countries' disputes
         [syn: {noninterference}] [ant: {intervention}, {intervention}]