[non-buh-lij-er-uh n-see]
  1. the state or status of not participating in a war.
  2. the status or policy of a nation that does not participate openly in a war but supports the cause of one of the belligerents.

Origin of nonbelligerency

First recorded in 1935–40; non- + belligerency Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018