Phrase 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
The amount of time required for an electromagnetic signal to travel from Earth to a spacecraft or another celestial body within the Solar System and then return.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: astronomy, cosmology, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: RTLT
Antonyms: none provided
Broader terms: elapsed time
History
No etymology was provided for this word.
