From Longman Dictionary of Contemporary Englishbe through (with somebody/something)be through (with somebody/something)informal a) FINISH DOING somethingto 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) RELATIONSHIPto no longer be having a relationship with someone That’s it! Simon and I are through. I’m through with you! → through
Examples from the Corpus
be through (with somebody/something)• As much as I hate to admit it, I think we're through.• I need to use the computer when you're through.• It is through changing them in a more fundamental way that the drugs cause addiction.• Newman's broken leg means he is through for the season.• But in ten minutes I was through it and on to the glacier-worn bare ledges.• The campaign believes the best way to reach independents is through more television ads.• A key way employees will find to increase their value to the company will be through service on these task forces.• It is through talk that our children learn about barometers, mortgages, civil rights, psychotherapy, and the Roman Empire.• The way you limit which files are shown is through the Search button.• All the big guns are through to the semi-finals as expected.• The traditional way of doing this was through war. 