Uninterested, a.
1. Not interested; not having any interest or property in; having nothing at stake; as, to be uninterested in any business.
2. Not having the mind or the passions engaged; as, uninterested in a discourse or narration.
Shades of meaning
Fernald lists uninterested only as an antonym, under eager, inquisitive.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given