a. Not real; unsubstantial; fanciful; ideal. [ 1913 Webster ]
n. The quality or state of being unreal; want of reality. [ 1913 Webster ]
v. t. [ 1st pref. un- + realize. ] To make unreal; to idealize. [ 1913 Webster ]
His fancy . . . unrealizes everything at a touch. Lowell. [ 1913 Webster ]
adv. In an unreal manner; ideally. [ 1913 Webster ]