Disinterested (adjective) means to have no bias and self-interest, impartial, having no stake in an outcome. A disinterested person is unbiased or impartial.
e.g.
1. Disinterested scientific opinion on fluoride naturally present in the groundwater.
2. Since the judge stands to profit from the sale of the property, he cannot be considered a disinterested party in the dispute.
Uninterested (adjective) means to have no enthusiasm for something, marked by a lack of interest, not having a financial interest. An uninterested person is indifferent, bored or unconcerned.
e.g.
1. Sam expressesed his interest in dating Carolina but she is uninterested.
2. Lufthansa's CEO Carsten Spohr has said he is uninterested in buying Etihad's stake in Air Berlin as long as the struggling German carrier's debt situation remains unchanged.
