Longman Dictionary of Contemporary English homepage

through

2 adjective
     
through2
1

be through (with somebody/something)

informal
a) to have finished doing something or using something:
I'm not through just yet - I should be finished in an hour.
Are you through with the computer yet?
b) to no longer be having a relationship with someone:
That's it! Simon and I are through.
I'm through with you!
2

through train

TTTTTR a train by which you can reach a place, without having to use other trains
3

through road

a road that joins cities, towns, or villages together

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