adj · noun · verb · 6 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
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.
/wʌn.weɪ/
wŭnʹwāʹ
Southern-England:Recorded audio is listed in the source snapshot.
Southern-England:Recorded audio is listed in the source snapshot.
CMU ARPABET:W AH1 N W EY1
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Allowing movement, vision, etc. in only one direction; unidirectional.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Examples
one-way mirror
The town centre is now a system of one-way streets.
Meaning relationships
Synonyms: none provided
Antonyms: two-way, bidirectional
2
adj
Meaning 2
Allowing travel in only one direction.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
Examples
I bought a one-way ticket to Leeds.
Meaning relationships
Synonyms: none provided
Antonyms: round-trip, return
3
adj
Meaning 3
Of a function: easy to compute for every input, but hard to invert given the image of a random input.
Definition source: English Wiktionary via Wiktextract