A2 from one end or side of something to the other: The River Seine flows through Paris. The Mississippi River flows through New Orleans.
B1 from the beginning to the end of something: He worked through the night.
B1 because of someone or something: She got the job through hard work.
B1 using something, or with someone’s help: I met my girlfriend through my brother.
› US from one time until another time: The store is open Monday through Friday.