UNDEFINED

undefined, vague

(adjective) not precisely limited, determined, or distinguished; “an undefined term”; “undefined authority”; “some undefined sense of excitement”; “vague feelings of sadness”; “a vague uneasiness”

Source: WordNet® 3.1

Etymology

Adjective

undefined (not comparable)

Lacking a definition or value.

(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.

Synonyms

• (lacking a definition or value): indefinite, undefinable; see also indistinct or vague

Antonyms

• defined

Source: Wiktionary