The Collaborative International Dictionary of English v.0.48:
Overrefine \O`ver*re*fine"\, v. t. To refine too much. [1913 Webster]WordNet (r) 3.0 (2006):
overrefine v 1: refine too much or with excess of subtlety; "He is overrefining this matter" [syn: overrefine, over- refine]