Definitions for overweeningˈoʊ vərˈwi nɪŋ
Random House Webster's College Dictionary
o•ver•ween•ingˈoʊ vərˈwi nɪŋ(adj.)
presumptuously conceited, overconfident, or proud.
Origin of overweening:
1300–50; ME overweninde, prob. as a calque of OF surcuidant; see over -, ween
excessive, extravagant, exuberant, overweening(adj)
unrestrained, especially with regard to feelings
"extravagant praise"; "exuberant compliments"; "overweening ambition"; "overweening greed"
"had a witty but overweening manner"; "no idea how overweening he would be"- S.V.Benet; "getting a little uppity and needed to be slapped down"- NY Times
An excessively high opinion of oneself or one's abilities; presumption, arrogance.
Unduly confident; arrogant; presumptuous; conceited.
She wins one modeling contest in Montana and suddenly she's overweening.