noun - a person whose job is to supervise a game and make sure that the players obey the rules (e.g. in tennis, baseball and cricket)

noun - someone who is not important now, although they were in the past or something that happened in the past and is not important now

noun - Harry's teacher of the Defense Against the Dark Arts in his fourth year at Hogwarts (he had a magical eye and only one leg)

phrase - a word we use as a question tag (a short question at the end of a statement to check that the statement is correct)

noun - a publication of the final-year students of high school or college that includes photographs of the students, information about their school activities etc.

interjection, American English, informal - an exclamation you use when something is obvious, for example when the other person asks you a question and the answer is obviously YES

noun - a structure built on the shore of a lake or on the bank of a river for ships to load or unload their cargo

noun, British English - a physical exercise in which you lie down in the horizontal position and lift and lower your body using the muscles on your arms

noun, American English - a physical exercise in which you lie down in the horizontal position and lift and lower your body using the muscles on your arms

noun - the action or fact of treating someone unfairly in order to benefit from their work; or the use of something for one’s own advantage

noun, technical - a type of mushroom with a thick stem and a spongy layer of pores under the cap instead of gills, including the edible porcini

noun - a room in a school where the lessons take place, there are usually desks and chairs for students and the teacher, a blackboard, etc.

noun - one of the pair of coverings for the feet and legs, usually worn by women; at Christmas, Santa Claus puts little presents into it