Southern Oscillation


: a periodic seesaw fluctuation in sea-level atmospheric pressures over the southern Pacific and Indian oceans that is believed to be linked to El Niño and La Niña events compare arctic oscillation, north atlantic oscillation

Word History

First Known Use

1923, in the meaning defined above

Time Traveler
The first known use of Southern Oscillation was in 1923

Dictionary Entries Near Southern Oscillation

Cite this Entry

“Southern Oscillation.” Dictionary, Merriam-Webster, Accessed 29 Jan. 2023.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?