Echt

Real stands for:

Echt-Susteren, part of the municipality of Echt-Susteren in the Netherlands
Real (band), the name of a former German music group
Real (magazine), the name of a magazine for members of the Evangelical Church in Hesse and Nassau
Real ( broadcast ), a science magazine of the TV station MDR
Real ( Aberdeenshire ), village in Aberdeenshire

The adjective really called in mathematics:

Proper subset, a subset of which is not identical to the basic quantity
Real divider divides a number, which is smaller than the number itself
Truly infinite, a property of projections and von Neumann algebras, see type classification ( von Neumann algebra)