(n.) Existence at the same time with another; -- contemporary existence.

Eisenhower Doctrine Monroe Doctrine Nixon Doctrine Truman Doctrine accompaniment agreement appeasement balance of power brinkmanship coetaneity coetaneousness coevalneity coevalness coincidence colonialism compromise concomitance concurrence containment contemporaneity contemporaneousness detente deterrence diplomacy diplomatic diplomatics dollar diplomacy dollar imperialism expansionism foreign affairs foreign policy good-neighbor policy imperialism internationalism isochronism isolationism manifest destiny militarism nationalism neocolonialism neutralism nonresistance open door open-door policy peace offensive peaceful coexistence preparedness shirt-sleeve diplomacy shuttle diplomacy simultaneity spheres of influence synchronism synchronization the big stick tough policy unison world politics