through

/θruː/ preposition

Definition

ONE SIDE TO ANOTHER › from one end or side of something to the other: The River Seine flows through Paris. The sun was shining through the window. She cut through the wire.

START TO END › from the start to the end of something: He worked through the night. The phone rang halfway through the programme.

BECAUSE OF › because of someone or something, or with someone's help: I got the job through my mum's friend. He became ill through eating undercooked meat.

UNTIL US (UK to) › from a particular time until and including another time: The store is open Monday through Friday. I worked there from May through September.

(Definition of through preposition from the Cambridge Learner's Dictionary © Cambridge University Press)