unipolar

Having a single pole.

All that talk of one superpower -- us -- bestriding a "unipolar" world seems as dated as Seinfeld reruns.

Not both depressive and manic; not bipolar.

Most studies have tended to find somewhat higher suicide rates in unipolar depression than in bipolar disorder

Of or relating to an international system in which one state wields most of the cultural, economic, and political influence.