From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unco \Un"co\, adv.
In a high degree; to a great extent; greatly; very. [Prov.
Eng. & Scot.]
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unco \Un"co\, n.
A strange thing or person. [Scot.]
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unco \Un"co\, a. [Scot. The same word as E. uncouth.]
Unknown; strange, or foreign; unusual, or surprising; distant
in manner; reserved. [Scot.]
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
unco
adv 1: to a remarkable degree or extent; "she was unusually
tall" [syn: unusually, remarkably, outstandingly,
unco] [ant: commonly, normally, ordinarily,
unremarkably, usually]