A plurality system is an electoral system in which the candidate who receives the most votes wins, regardless of whether they have obtained an absolute majority.
In a majority system, candidates need to obtain more than 50% of votes to win. If no candidate achieves this in the first round, there may be a runoff election between the top two candidates.
First-Past-The-Post (FPTP): First-past-the-post is another term for plurality systems where candidates with the most votes win, regardless of whether they have an absolute majority.