As happens in real life; not fictional or theoretical; actual as opposed to believed or assumed.

(literally) An authentic bargain. / (idiomatic) A beneficial result or favorable state-of-affairs.

(mathematics) The real number system, viewed as a line.

(theology) The actual presence of Christ's body and blood in the Eucharistic sacrament.

(mathematics) Used to describe a mathematical entity, like a function, that takes values from the real numbers (as opposed to, for instance, from the complex numbers).

Referring or relating to real estate.

(economics) Capital that is not financial capital, such as shovels for gravediggers, sewing machines for tailors, or machinery for manufacturing firms.

Alternative form of real-world

The realm of human experience comprising physical objects, and excluding theoretical constructs, hypotheses, artificial environments, and "virtual" worlds such as the Internet, computer simulations, or the imagination.

(retronym) an indoor racket sport from which the modern game of tennis (lawn tennis) is descended