1) the situation within which something exists or happens, and that can help explain it.
2) the text or speech that comes immediately before and after a particular phrase or piece of text and helps to explain its meaning.
contest has a lot of meaning but I will give you some of them.
1) a competition to do better than other people, usually in which prizes are given.
2) an attempt, usually against difficulties, to win an election or to get power or control.
Student or Learner