Meanings
nounlight barrier (uncountable)
- uncountableThe speed of light, seen as a barrier to faster-than-light travel.
Synonyms & antonyms
Also see
Origin
On the grounds that special relativity predicts that no object can travel faster than light. Compare sound barrier.
Full word history & related roots →Cite this entry
APA
light barrier. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/light%20barrier
MLA
“light barrier.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/light%20barrier. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “light barrier,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/light%20barrier.
Source: light barrier on Wiktionary, CC BY-SA 4.0.