- Noun. (logical fallacy) A fallacious objection to an argument or factual claim by appealing to a characteristic or belief of the person making the argument or claim, rather than by addressing the substance of the argument or producing evidence against the claim; an attempt to argue against an opponent's idea by discrediting the opponent himself.
- Noun. A personal attack.
- Adjective. Of or relating to ad hominem.
- Adverb. In an ad hominem manner.