European football is a colloquial term referring to any international

International

----International mostly means something that involves more than one country. The term international as a word means involvement of, interaction between or encompassing more than one nation, or generally beyond national boundaries...

 football club competition that is organised by UEFA

UEFA

The Union of European Football Associations , almost always referred to by its acronym UEFA is the administrative and controlling body for European association football, futsal and beach soccer....

. Any club that wishes to participate in European football must qualify through their respective domestic league or domestic cup competitions. The term may also mean simply club football that takes place in Europe.

There are many online European Football communities and fantasy games that discuss and compete amongst themselves to identify the best up-and-coming players in European football.

The following sites are some of the most popular and useful sources of information for European football:

http://www.european-football-statistics.co.uk/ - In-depth stats on all European matches
http://www.euro-eleven.com - 'One-stop football heaven' that includes the World's first pan-European Fantasy Football game

Active

• UEFA Champions League
  UEFA Champions League
  The UEFA Champions League, known simply the Champions League and originally known as the European Champion Clubs' Cup or European Cup, is an annual international club football competition organised by the Union of European Football Associations since 1955 for the top football clubs in Europe. It...
  
  , Europe's premier football club competition, reorganised in 1992.
• UEFA Europa League, Europe's second football club competition, reorganised in 2009.
• UEFA Super Cup, the previous seasons winners of the Europa League and the Champions League. Previously played between the European cup and Cup winners cup holders.

Renamed or Defunct

• European Champion Clubs' Cup (1955-1992), expanded and renamed UEFA Champions League
  UEFA Champions League
  The UEFA Champions League, known simply the Champions League and originally known as the European Champion Clubs' Cup or European Cup, is an annual international club football competition organised by the Union of European Football Associations since 1955 for the top football clubs in Europe. It...
  
   in 1992.
• UEFA Cup
  UEFA Cup
  The UEFA Europa League is an annual association football cup competition organised by UEFA since 1971 for eligible European football clubs. It is the second most prestigious European club football contest after the UEFA Champions League...
  
   (1971-2009), expanded and renamed UEFA Europa League in 2009.
• UEFA Cup Winners' Cup
  UEFA Cup Winners' Cup
  The UEFA Cup Winners' Cup was a football club competition contested annually by the most recent winners of all European domestic cup competitions. The cup is one of the many inter-European club competitions that have been organised by UEFA. The first competition was held in the 1960–61 season—but...
  
   (1960-1999), disbanded with qualifying clubs transferred to UEFA Cup
  UEFA Cup
  The UEFA Europa League is an annual association football cup competition organised by UEFA since 1971 for eligible European football clubs. It is the second most prestigious European club football contest after the UEFA Champions League...
  
   in 1999.
• UEFA Intertoto Cup
  UEFA Intertoto Cup
  The UEFA Intertoto Cup, also abbreviated as UI Cup and originally called the International Football Cup, was a summer football competition for European clubs that had not qualified for one of the two major UEFA competitions, the Champions League and the UEFA Cup. The competition was discontinued...
  
   (1961-2009), disbanded with qualifying clubs transferred to UEFA Europa League in 2009.