Parents need to have good 'communication' with their children. [=they need to be able to understand and be understood by their children]
a 'communications satellite' [=a satellite that is used to send signals for television, radio, etc., to people around the world]
('formal') We are 'in communication' by e-mail. [=we are communicating with each other by e-mail]
(..) Those cards, they were in Coulson's locker, not in his jacket. They needed the push. They found him. Get our communications back up, whatever you have to do. - I want eyes on everything. - Yes, sir. It's too late! She can't stop now. (..)2012 The Avengers
(..) to... These were in Phil Coulson's jacket. I guess he never did get you to sign them. We're dead in the air up here. Our communications, the location of the Cube, Banner, Thor... I got nothing for you. I lost my one good eye. Maybe I had that coming. (..)2012 The Avengers