to treat or speak to insolently or with contemptuous rudeness; affront.

to affect as an affront; offend or demean.

Archaic . to attack; assault.

Archaic . to behave with insolent triumph; exult contemptuously (usually fol. by on, upon, or over ).

an insolent or contemptuously rude action or remark; affront.

something having the effect of an affront

That book is an insult to one's intelligence.

Medicine/Medical .

an injury or trauma.

an agent that inflicts this.

Archaic . an attack or assault.