v. t. [ AS. oferwēnian. See Over, and Ween. ] To think too highly or arrogantly; to regard one's own thinking or conclusions too highly; hence, to be egotistic, arrogant, or rash, in opinion; to think conceitedly; to presume. [ 1913 Webster ]
They that overween,
And at thy growing virtues fret their spleen. Milton. [ 1913 Webster ]
n. One who overweens. [ R. ] [ 1913 Webster ]
a. Unduly confident; arrogant; presumptuous; conceited. --
The conceits of warmed or overweening brain. Locke. [ 1913 Webster ]
Here's an overweening rogue. Shak. [ 1913 Webster ]
n. Conceit; arrogance. Milton. [ 1913 Webster ]