El Ni‧ño /el ˈniːnjəʊ/
a change in the weather that happens every three to seven years, caused by a rise in the temperature of a large area of the Pacific Ocean off the west coast of South America. El Niño has severe effects on the weather in many parts of the world, and can cause drought (=complete lack of rain) in some places and heavy rain and violent storms in other places.

[TahlilGaran] Dictionary of Contemporary English ▲