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At less than the speed of light.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Topics: literature, media, publishing, science-fiction
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Etymology tree Proto-Indo-European *upó Proto-Italic *supo Latin sub Latin sub-der. English sub- Proto-Indo-European *lewk-der. Proto-Germanic *leuhtaz Proto-West Germanic *leuht Old English lēoht Middle English light English light English sub-light From sub- + light.