Motion - the viewpoint that is argued for or against.

Proposer - speaks in favour of the motion which, in many cases, they have written.

Opposer - speaks against the motion after the proposer has made their speech.

Seconders - two people who speak after the proposer and opposer, one for and one against the motion.

Amendments - these are changes that may be suggested for the main motion to change its wording slightly. Amendments also require opposers and seconders.

Abstain - if you don't vote either for or against the motion, you are said to abstain. This may be because you can't make up your mind or disagree with both opposing views.