noun
authority figure; person of authority
Refers to a person who holds recognized expertise, power, or influence in a particular field or context.
彼はこの分野の権威者として知られている。
He is known as an authority in this field.
その決定は権威者によって下された。
The decision was made by an authority figure.
専門家 emphasizes specialized knowledge or expertise, whereas 権威者 carries a stronger connotation of recognized power or influence in addition to expertise.
Compound of 権威 (authority, prestige) and 者 (person). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for forming agent nouns.