The Collaborative International Dictionary of English v.0.48:
single-minded \sin"gle-mind"ed\, a. Having a single purpose; concentrating on a single goal; hence, artless; guileless; single-hearted. [1913 Webster]WordNet (r) 3.0 (2006):
single-minded adj 1: determined; "she was firmly resolved to be a doctor"; "single-minded in his determination to stop smoking" [syn: single-minded, resolved]