Definitions
1.noun(in ancient Rome) A person (professional or slave) who entertained the public by engaging in mortal combat with another, or with a wild animal.
2.noun(by extension) A disputant in a public controversy or debate.
3.nounA professional boxer.
4.verbTo fight as entertainment for others.
5.verbTo compete in a public contest.
6.verbTo debate or argue.
7.verbTo act aggressively toward others.