reáln

Reáln is not a common standalone lemma in modern Czech dictionaries; it functions primarily as the stem of the adjective reálný. The standard forms are reálný (masculine), reálná (feminine), and reálné (neuter), with corresponding inflected forms in sentences. As a bare word, reáln rarely appears outside discussions of morphology or compound phrases.

In everyday and technical usage, the meaning aligns with real, factual or actual, as opposed to imaginary or hypothetical. Typical collocations include reálné číslo (real number), reálná osa (real axis), reálná hodnota (real value), and reálný svět (the real world). In mathematics, physics and related fields, these phrases are widespread and form part of standard terminology when distinguishing real numbers from complex or imaginary quantities.

Etymology and cognates: the Czech reálný derives from the Latin realis, via historical borrowing pathways such as French réel or German real. The sense of “real” in Czech combines philosophical, mathematical, and everyday connotations of actuality or factuality.

Related terms and usage: the noun reálnost (realness, actuality) and the noun realismus (realism) share the same root, but they belong to different word classes and are used in distinct contexts. In Czech, the common adjectival form reálný is preferred when describing objects, values, or concepts as real or factual.

See also: real numbers, real axis, realism, realismus, realnost.