"peacekeeping" in the noun sense
1. peacekeeping, peacekeeping mission, peacekeeping operation
the activity of keeping the peace by military forces (especially when international military forces enforce a truce between hostile groups or nations)
"peacekeeping" in the adjective sense
1. peacekeeping
of or relating to the preservation of peace between hostile groups by international military forces
"a peacekeeping force"
Source: WordNet® (An amazing lexical database of English)
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