Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
No pronunciation record was provided for this word.
noun
A transition line, coinciding with a twilight zone (terminator), where a change in the propagation of radio waves is observed.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
Qualifier: strictly
Topics: engineering, natural-sciences, physical-sciences, technical
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
Synonym of twilight zone (“terminator”).
Definition source: English Wiktionary via Wiktextract
Usage: broadly, uncountable
No example sentence was provided for this meaning.
Synonyms: twilight zone
Antonyms: none provided
History
From grey + line.
