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]
(..) Speed it up. Electrical impulses... Every cell knows and talks to every other cell. They exchange a thousand bits of information between them per second. Cells group together, forming a giant web of communication which in turn forms matter. Cells get together, take on one form, deform, reform, (..)2014 Lucy