From Longman Dictionary of Contemporary Englishbe with you/mebe with you/meto understand what someone is telling you or explaining to youSorry, I’m not with you – which room do you mean?So that’s how the system works. Are you with me? →with
Examples from the Corpus
be with you/me• At night his songis with me.• That's how it was with me and I know it was true for many others.• How compatible will you be with me and the other workers?• I'd wanted Doug to be with me, but he couldn't get the time off.• Our response should therefore be with you in early May.• The monster had promised to be with me on my wedding night, but he had not planned to kill me.• He was with me the night I metJasper.• Anywhere I was with you would be home to me.