1. To talk about something at length and in detail; especially, as part of a formal exchange of opinions: The candidate for President of the U.S. was debating with his challenger in front of a TV audience.
2. To ponder, or to think, about something carefully: The accuracy of Dr. Clegg's opinion was debated by his colleagues.

1. Considering something; deliberating.
2. Engaging in an argument by discussing opposing points.
3. Engaging in a formal discussion or argument.
4. A formal contest consisting of argumentation in which two opposing teams are defending and attacking a given proposition.