Definitions

1. adjective

relating to or given to arguments, or to the nature of argumentation

“The argumental tone of his speech was a turn-off for the audience.”

2. noun

a person who is argumentative or fond of arguments

“In the debate, the argumental participant raised several contentious points.”

3. adverb

in an argumentative manner

“He spoke argumentally, trying to convince the other side to change their stance.”