Etymology
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adviser (n.)

1610s, "one who gives advice," agent noun from advise (v.). Meaning "faculty assigned to mentor students" is from 1887. Meaning "military person sent to help a government or army in a foreign country" is recorded from 1915. Alternative form, Latinate advisor, is perhaps a back-formation from advisory.

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Definitions of adviser

adviser (n.)
an expert who gives advice;
an adviser helped students select their courses
Synonyms: advisor / consultant
From wordnet.princeton.edu