Islamophobia is defined as "Intense dislike or fear of Islam, esp. as a political force; hostility or prejudice towards Muslims".
The term Islamophobia was first used in the early 20th century and it emerged as a neologism in the 1970s, then it became increasingly salient during the 1980s and 1990s, and it reached public policy prominence with the report by the Runnymede Trust's Commission on British Muslims and Islamophobia (CBMI) entitled Islamophobia: A Challenge for Us All (1997). The introduction of the term was justified by the report's assessment that "anti-Muslim prejudice has grown so considerably and so rapidly in recent years that a new item in the vocabulary is needed".
The causes and characteristics of Islamophobia are still debated. Some commentators have posited an increase in Islamophobia resulting from the September 11 attacks, while others have associated it with the increased presence of Muslims in the United States and in the European Union. Some people also question the validity of the term. The academics S. Sayyid and Abdoolkarim Vakil maintain that Islamophobia is a response to the emergence of a distinct Muslim public identity globally, the presence of Muslims is in itself not an indicator of the degree of Islamophobia in a society. Sayyid and Vakil maintain that there are societies where virtually no Muslims live but many institutionalized forms of Islamophobia still exist in them.
There are a number of other possible terms which are also used in order to refer to negative feelings and attitudes towards Islam and Muslims, such as anti-Muslimism, intolerance against Muslims, anti-Muslim prejudice, anti-Muslim bigotry, hatred of Muslims, anti-Islamism, Muslimophobia, demonisation of Islam, or demonisation of Muslims. In German, Islamophobie (fear) and Islamfeindlichkeit (hostility) are used. The Scandinavian term Muslimhat literally means "hatred of Muslims".
When discrimination towards Muslims has placed an emphasis on their religious affiliation and adherence, it has been termed Muslimphobia, the alternative form of Muslimophobia, Islamophobism, antimuslimness and antimuslimism. Individuals who discriminate against Muslims in general have been termed Islamophobes, Islamophobists,anti-Muslimists,antimuslimists,islamophobiacs,anti-Muhammadan,Muslimphobes or its alternative spelling of Muslimophobes, while individuals motivated by a specific anti-Muslim agenda or bigotry have been described as being anti-mosque,anti-Shiites. (or Shiaphobes), anti-Sufism (or Sufi-phobia) and anti-Sunni (or Sunniphobes).