What is Cyclone ?
Cyclone is (noun) 1. an area of low pressure, usually associated with bad weather. Compare anticyclone 2. a tropical storm in the Indian and Pacific Oceans, where the air moves very fast in a circle round a central area According to the shipping forecasts, a cyclone is approaching Sri Lanka. (NOTE: In the Far East this is called a typhoon; in the Caribbean a hurricane.)
source: Easier English, Student Dictionary Upper Intermediate Level