Analog or digital communications device in which the user has a wireless connection from a telephone to a nearby transmitter. It is termed cellular because the service area is divided into multiple "cells." As the user moves from one cell area to another, the call is transferred to the local transmitter.
An instrument for reproducing sounds especially articulate speech at a distance. (Webster, 3rd ed)
Communication between CELL PHONE users via the Short Message Service protocol which allows the interchange of short written messages.