The English Football Association has announced it will adopt the International Holocaust Remembrance Alliance's working definition of anti-Semitism in an attempt to end discrimination.
The definition is also used by the European Parliament and the governments of more than 30 countries.
The IHRA's working definition of anti-Semitism states: "Antisemitism is a certain perception of Jews, which may be expressed as hatred toward Jews. Rhetorical and physical manifestations of antisemitism are directed toward Jewish or non-Jewish individuals and/or their property, toward Jewish community institutions and religious facilities."
By using this definition, the FA said it hopes to ensure there is consistency in defining anti-Semitic comments or conduct.
"Tackling all forms of discrimination and promoting equality has long been a priority for the FA as we strive for a game that is a truly safe and inclusive environment for all," FA chief executive officer Mark Bullingham said in a statement.
"Adopting this working definition is an important step and it will provide clarity across football on what language or actions may be considered antisemitic.
"We will continue to work closely with the relevant authorities and everyone within football to reaffirm the message that antisemitic behaviour is completely unacceptable."
Wembley Stadium will be turned purple on Wednesday to mark International Holocaust Remembrance Day.