: to stop communicating with each other : to no longer know what is happening in each other's lives
They were friends in college, but then they moved to different cities and lost touch.
—often + with
She lost touch with her college roommate after graduation.
2
: to stop knowing what is happening, how certain people feel, etc.—usually + with
I read the newspaper every morning so that I don't completely lose touch with what's happening in the world.She seems to have lost touch with reality and thinks that she can have everything she wants.