0 from one end or side of something to the other: --
I'll put you through (= connect you by phone) (to the sales department).
I saw him drive through a red light (= he did not stop at the red traffic light).
Her words kept running through my mind/head (= I kept hearing her words in my imagination).
How long the journey takes will depend on how long it takes to get through the traffic.
2 as a result of: --
The company lost the order through production delays.
3 by; using: --
4 having finished using or doing something: --
5 to achieve success in an exam, competition, etc. and progress to the next stage or a higher level: --
UK "Has she heard about her entrance exams yet?" "Yes, she's through."
She's through to the next round of interviews.
Speaking through an interpreter, the president said the terms of the ceasefire were completely unacceptable.
She still controls the company indirectly through her son, who is the managing director.
The performers tell the story through song and dance.
Four million hours were lost last year through stress-related illnesses.
The soil has been so heavily leached through intensive farming that it is no longer fertile.