Learner's definition of DISINTERESTED
[more disinterested; most disinterested]
not influenced by personal feelings, opinions, or concerns
A disinterested [=unbiased, impartial] third party mediated the dispute.
the disinterested pursuit of truth
having no desire to know about a particular thing
— often + in
◊ This sense is commonly used but some people consider it to be incorrect and say that “uninterested” should be used instead.