Simple Definition:

Communication is the process of exchanging information or ideas between two or more people or groups. It involves sending and receiving messages through various methods, such as speaking, writing, or using gestures and facial expressions. For example, when two friends talk on the phone to make plans for the weekend, they are using communication to share their ideas and coordinate their activities.

Very Simple Definition:

Communication is when people talk or write to each other to share information. For example, when friends talk on the phone to decide where to go together, they are communicating.