a. causing damage or harm; injurious
The candidate's acceptance of major financial contributions from a well known racist ultimately proved detrimental to his campaign, for he lost the backing of many of his early grassroots supporters.
Sentence in Classic:
It is, I suppose, the reaction from the haunting fear which I have had: that this terrible affair and the reopening of his old wound might act detrimentally on Jonathan.
Some ladies, with faces betraying complete forgetfulness of all the rules of decorum, pushed forward to the detriment of their toilets.
War and Peace(V2) By Leo Tolstoy Context
An army gains a victory, and at once the rights of the conquering nation have increased to the detriment of the defeated.
War and Peace(V5) By Leo Tolstoy Context
I have noticed this point the more readily, because I have often found such uncertainty hinder the public business of our own republic, to its detriment and discredit.
Discourses on the First Decade of Titus Livius By Niccolo Machiavelli Context