Meaning of “disinterested” in the English Dictionary

"disinterested" in British English

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disinterestedadjective

uk /dɪˈsɪn.trə.stɪd/ us /dɪˈsɪn.trə.stɪd/

having no personal involvement or receiving no personal advantage, and therefore free to act fairly:

a disinterested observer/judgment
a piece of disinterested advice
Note: Disinterested is sometimes used to mean not interested, but many people consider this use to be incorrect. Compare uninterested.

(Definition of “disinterested” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"disinterested" in American English

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disinterestedadjective

us /dɪsˈɪn·trə·stɪd, -ˈɪnt·əˌres·tɪd/

disinterested adjective (NOT INVOLVED)

having no personal involvement or receiving no personal advantage, and therefore free to act fairly:

disinterested advice
a disinterested observer

disinterested adjective (NOT INTERESTED)

not interested:

Unlike most boys his age, he was totally disinterested in cars or girls.

(Definition of “disinterested” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"disinterested" in Business English

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disinterestedadjective

uk /dɪˈsɪntrəstɪd/ us

someone who is disinterested will receive no personal advantage from a situation, so their advice or a decision relating to it will probably be fair:

Determination must be made by disinterested trustees or independent legal counsel.

(Definition of “disinterested” from the Cambridge Business English Dictionary © Cambridge University Press)