Meanings
noungrey line (plural grey lines)
plural grey lines
- Synonym of terminator (“the line between the day side and the night side of a moon, planet or other celestial body”).
Synonyms: terminator
Synonyms & antonyms
nounSynonym of terminator (“the line between the day side and the night side of a moon, planet or other celestial body”).
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Cite this entry
APA
grey line. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/grey%20line
MLA
“grey line.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/grey%20line. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “grey line,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/grey%20line.
Source: grey line on Wiktionary, CC BY-SA 4.0.