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The Oxford Dictionary mentions the meanings as follows:
Diplomat: (noun) An official representing a country abroad.
Unbiased (also Unbiassed) (adjective) : showing no prejudice; impartial.
But today, the assumed or imaginary meanings of many words could be several-fold - for example, the Sanskrit/Hindi word 'Guru' is a word of respect but today, in Bollywood films or Mumbai-tone, it could mean the Head of a gangster gang. Similarly, in India, 'master' could mean a tailor or a carpenter. Americans call Condaleeza Rice as their 'top diplomat', though she is not posted abroad. So, for multiple or assumed meanings of such words, other synonyms should better be used.
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