The definition of single minded is a focus on one thing at the expense of anything else.
An example of single minded is a person who cares about only his own happiness and who will do anything to make himself happy.
- with only one aim or purpose
- Having one overriding purpose or goal: the single-minded pursuit of money.
- Steadfast; resolute: He was single-minded in his determination to stop smoking.
(comparative more singleminded, superlative most singleminded)