from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To think too highly or arrogantly of (oneself).
- v. To make or render arrogant and overweening.
- v. To overwhelm.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. 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.
from The Century Dictionary and Cyclopedia
- To think too highly or confidently, especially of one's self; be arrogantly conceited; presume: now chiefly in the present participle.
- To make conceited or arrogant.
 Magna petis Phaeton et quae non viribus istis, &c., as James and John, the sons of Zebedee, did ask they knew not what: nescis temerarie nescis; thou dost, as another Suffenus, overween thyself; thou art wise in thine own conceit, but in other more mature judgment altogether unfit to manage such a business.
Some are too partial, as friends to overween, others come with a prejudice to carp, vilify, detract, and scoff;
"I am the servant of a distant queen Who can overween and intervene Can we finally make her obsolete?