An Etymological Dictionary of Astronomy and Astrophysics

1a) Appealing to or engaging the → intellect.

1b) Of or pertaining to the intellect or its use.

1c) Possessing or showing intellect or mental capacity, especially to a high degree: an intellectual person.

1d) Guided or developed by or relying on the intellect rather than upon emotions or feelings; rational.

1e) Characterized by or suggesting a predominance of intellect.

1f) (n.) A person of superior intellect.

1g) A person who places a high value on or pursues things of interest to the intellect or the more complex forms and fields of knowledge, as aesthetic or philosophical matters, especially on an abstract and general level.

1h) An extremely rational person; a person who relies on intellect rather than on emotions or feelings.

2. A person professionally engaged in mental labor, as a writer or teacher (Dictionary.com).

Etymology (EN): From L. intellectualis, → intellect + → -al.

Etymology (PE): Hošanvâr with suffix -vâr denoting suiting, befitting, resembling, in the manner of, possession (as in omidvâr, ayâlvâr, râhvâr).