X11

proper noun

A windowing system for bitmap displays, common on Unix-like operating systems.

Similar
X
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Meanings

proper noun
  1. UnixcomputingA windowing system for bitmap displays, common on Unix-like operating systems.

    Synonyms: X

Synonyms & antonyms

proper nounA windowing system for bitmap displays, common on Unix-like operating systems.

Similar
X
Also see
x

Origin

So called because it is the 11th version of the X Window System.

Full word history & related roots →
Cite this entry
APA

X11. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/X11

MLA

“X11.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/X11. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “X11,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/X11.

Source: X11 on Wiktionary, CC BY-SA 4.0.