The act of giving insult.
"His constant insults made everyone in the room feel uncomfortable."
present participle of insult
"The comments made during the meeting were insulting because they openly mocked his hard work in front of everyone."
expressing extreme contempt
"The comedian's joke was so insulting that it seemed to express nothing but pure contempt for his audience's intelligence."
Containing insult, or having the intention of insulting.
"The referee's tone felt increasingly insulting as he kept blowing his whistle without acknowledging our successful plays."