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 major monsoon systems of the world consist of the West African and Asia-Australian monsoons. The inclusion of the North and South American monsoons with incomplete wind reversal has been debated.

The term was first used in English in British India (now India, Bangladesh and Pakistan) and neighbouring countries to refer to the big seasonal winds blowing from the Bay of Bengal and Arabian Sea in the southwest bringing heavy rainfall to the area.

The English monsoon came from Portuguese monção, ultimately from Arabic mawsim (موسم "season"), "perhaps partly via early modern Dutch monsun".

Tokio Hotel is a rock band from Germany, founded in 2001 by singer Bill Kaulitz, guitarist Tom Kaulitz, drummer Gustav Schäfer and bassist Georg Listing. The quartet have scored four number one singles and have released three number one albums in their native country, selling nearly 5 million CDs and DVDs there. After recording an unreleased demo-CD under the name "Devilish" and having their contract with Sony BMG Germany terminated, the band released their first German-language album, Schrei, as Tokio Hotel on Universal Music Germany in 2005. Schrei sold more than half a million copies worldwide and spawned four top five singles in both Germany and Austria. In 2007, the band released their second German album Zimmer 483 and their first English album Scream which have combined album sales of over one million copies worldwide and helped win the band their first MTV Europe Music Award for Best InterAct. The former, Zimmer 483, spawned three top five singles in Germany while the latter, Scream, spawned two singles that reached the top twenty in new territories such as France, Portugal, Spain and Italy. In September 2008, they won in the US their first MTV Video Music Award (VMA) for Best New Artist. In October 2008, they won four awards including Best International Artist and Song of the year at Los Premios MTV Latinoamérica (MTV Video Music Awards Latin America) held in Mexico. Tokio Hotel became the first German band ever to win an award at the MTV VMAs and also at the MTV Latin America Awards. They also picked up the Headliner award at the MTV Europe Music Awards 2008 held in Liverpool on November 6, 2008 and the Award for Best Group on November 5, 2009 at the MTV Europe Music Award (EMA) held in Berlin. They won an Award for Best World Stage Performance on November 7, 2010 at the MTV Europe Music Awards in Madrid. In July 2011, they became the first German band to win an MTV Video Music Awards Japan (VMAJ). And won MTV's 2012 Musical March Madness.