Phrase guide

one-way light time

noun · 2 senses · updated from the 2026-07-25 local source snapshot

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

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

The amount of time required for light or a radio signal to travel between the Earth and a celestial body.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: astronomy, astrophysics, natural-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

the elapsed time it takes for light (or radio signals) to travel between the Earth and a celestial object

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: OWLT

Antonyms: none provided

Broader terms: elapsed time

History

Etymology

No etymology was provided for this word.