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a strong feeling of dislike, opposition, repugnance, or antipathy (usually followed by to):
a strong aversion to snakes and spiders.
a cause or object of dislike; person or thing that causes antipathy:
His pet aversion is guests who are always late.
Obsolete. the act of averting; a turning away or preventing.
Contemporary Examples

Friedersdorf said he recently profiled former New Mexico governor Gary Johnson and liked his “aversion to self-promotion.”
Trump’s Self-Promotion Gene Howard Kurtz April 25, 2011

My aversion to getting old, I must confess, has long been, and continues to be, teetering on the pathological.
My Odyssey Into Extreme Dermatology Elizabeth Hayt April 14, 2009

The first lady just opened up about her aversion to counting calories.
Michelle Obama’s 11 Diet and Fitness Secrets Isabel Wilkinson August 21, 2012

I think the term, and there’s an aversion to it, is “bankruptcy.”
Too Little. Too Late? The Daily Beast February 9, 2009

Anyone with an aversion to ketchup would be delighted to learn that Ronald Reagan went 70 years without eating a tomato.
Eating With the Stars Kara Cutruzzula August 2, 2010

Historical Examples

Brulon declared, that the difficulty did not proceed from any aversion to Grotius, whom the King highly esteemed.
The Life of the Truly Eminent and Learned Hugo Grotius Jean Lvesque de Burigny

As to this odious Solmes, I wonder not at your aversion to him.
Clarissa, Volume 1 (of 9) Samuel Richardson

He had been so long detained in America chiefly in consequence of Wieland’s aversion to the scheme which he proposed.
Wieland; or The Transformation Charles Brockden Brown

How can one like and have an aversion to a person at the same time?
Dust Mr. and Mrs. Haldeman-Julius

That this reaction of aversion is genuine is not contradicted by the fact that we catch Erasmus himself in untruths.
Erasmus and the Age of Reformation Johan Huizinga

noun
usually foll by to or for. extreme dislike or disinclination; repugnance
a person or thing that arouses this: he is my pet aversion
n.

“a turning away from,” 1590s; figurative sense of “mental attitude of repugnance” is from 1650s, from Middle French aversion and directly from Latin aversionem (nominative aversio), noun of action from past participle stem of aversus “turned away, backwards, behind, hostile,” itself past participle of avertere (see avert). Earlier in the literal sense of “a turning away from” (1590s). Aversion therapy in psychology is from 1950.

aversion a·ver·sion (ə-vûr’zhən, -shən)
n.

A fixed, intense dislike; repugnance, as of crowds.

A feeling of extreme repugnance accompanied by avoidance or rejection.