Who defines Armenia killings as genocide?

The following countries have passed, at varying levels of legislature, motions to declare the 1915-17 mass killings in Armenia as "genocide":

Chile passed a Senate Resolution in 2007.

Argentina passed a law in 2006.

Lithuania passed an Assembly Resolution in 2005.

Slovakia passed a National Assembly Resolution in 2004.

Canada passed a House of Commons Resolution in 2004.

Switzerland passed a National Council Resolution in 2003.

France passed a law in 2001.

Greece passed a Parliament Resolution in 1996 establishing a day of the commemoration of the genocide.

European Parliament passed a Parliament Resolution in 1987.

Cyprus passed a House of Representatives Resolution in 1982.

Source: National Academy of Science of the Republic of Armenia, The Armenian Genocide Museum-Institute