2. (biology) the basic structural and functional unit of all organisms; cells may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
3. a device that delivers an electric current as the result of a chemical reaction
4. a small unit serving as part of or as the nucleus of a larger political movement
5. a hand-held mobile radiotelephone for use in an area divided into small sections (cells), each with its own short-range transmitter/receiver