Originally Scottish. Esp. of persons: not taking sides in a controversy, dispute, disagreement, etc.; not inclining toward any party, view, etc…

Not extreme or excessive; moderated.

Belonging to neither of two specified, implied, or usual categories. Obsolete.

Of an opinion, its advocates, etc.: tending to mediate between extremes; moderating.

Not set apart as distinct or clearly defined; not distinguished from others by some feature, characteristic, etc.

Of particular perfection or significance; ideal. Hence: constituting a goal to be aimed at or attained; desirable. Cf. golden mean, n. 1.