01 v. t. To think too highly or arrogantly; to regard one's own thinking or conclusions too highly; hence, to be egotistic, arrogant, or rash, in op…
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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.“They that overween, And at thy growing virtues fret their spleen.” — Milton.