Monsoon is traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation, but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea. Usually, the term monsoon is used to refer to the rainy phase of a
seasonally changing pattern, although technically there is also a dry
phase. The term is sometimes incorrectly used for locally heavy but
short-term rains, although these rains meet the dictionary definition of monsoon.