Word.ws English Dictionary

grayline

grayline is the alternative spelling of greyline.

Meaning of greyline

Noun

greyline (uncountable)

  1. (strictly) A transition line, coinciding with a twilight zone (terminator), where a change in the propagation of radio waves is observed.
  2. (broadly) Synonym of twilight zone (“terminator”).
    Synonyms:
    twilight zone

Questions about grayline

What is grayline the alternative spelling of?
Grayline is the alternative spelling of greyline.

Words near grayline in the dictionary

  1. graylag goose
  2. graylags
  3. graylet
  4. graylevel
  5. graylevels
  6. grayline
  7. grayling
  8. graylings
  9. graylist
  10. graylisted
  11. graylisting

Source and license

Adapted from Wiktionary: grayline (page history and authors); greyline (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “grayline.” Word.ws, https://word.ws/grayline. Based on Wiktionary, CC BY-SA 4.0.