0 an unusual ocean current that happens along the western coast of South America every two to ten years, killing large numbers of sea creatures and causing noticeable and often severe changes in weather conditions in many areas of the world:
the El Niño weather pattern/system/phenomenon
Rains came late to the region because of El Niño.
1 a period during which a warm water current develops in the Pacific Ocean near South America and causes changes to the weather in many parts of the world
