one-way

/wʌn.weɪ/

adjective

Allowing movement, vision, etc. in only one direction; unidirectional.

“one-way mirror”

Meanings

adjectiveone-way (not comparable)
  1. not comparableAllowing movement, vision, etc. in only one direction; unidirectional.

    one-way mirror

    2 more examples

    The town centre is now a system of one-way streets.

    Traditional feedback collection through pen-and-paper questionnaires and oral reports usually only supplies one-way feedback, from student to teacher.

    2017, Di Zou, James Lambert, “Feedback methods for student voice in the digital age”, in British Journal of Educational Technology, volume 48, number 5, page 1087

    Antonyms: two-way, bidirectional

  2. not comparableAllowing travel in only one direction.

    I bought a one-way ticket to Leeds.

    Antonyms: round-trip, return

  3. not comparablecomputerOf a function: easy to compute for every input, but hard to invert given the image of a random input.
verbone-way (third-person singular simple present one-ways, present participle one-waying, simple past and past participle one-wayed)

present singular third person one-ways · participle present one-waying · participle past one-wayed · past one-wayed

  1. transitiveagricultureTo use a disc harrow to turn the soil and kill weeds, in preparation for planting seeds.

    Over a period of 10 years, the average yield under stubble-mulch tillage has been 10 percent greater than under one-waying with continuous wheat, and 14 percent greater than under one-waying with wheat on fallow.

    1935, Report of the Chief of the Soil Conservation Service, page 58
nounone-way (plural one-ways)

plural one-ways

  1. uncommonlifestyleA one-way trip or flight.

    I wanted to fly but they say a system's coming in Chances are high that this is a one way

    2025, Twenty One Pilots, “One Way”, in One Way

Synonyms & antonyms

adjectiveAllowing movement, vision, etc. in only one direction; unidirectional.

adjectiveAllowing travel in only one direction.

More synonyms by meaning

adjectivemoving or permitting movement in one direction only

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

From one + way. First attested in 1906 in reference to one-way tickets; 1914 in reference to one-way streets; 1940 in reference to one-way mirrors.

Full word history & related roots →

Translations

Bulgarian еднопосочен, еднопосочен
  • еднопосочен (ednoposočen)allowing travel in only one direction
  • еднопосочен (ednoposočen)computer science: easy to compute, hard to invert
  • еднопосочен (ednoposočen)allowing movement in only one direction
Chinese Mandarin 單程 /单程, 單向 /单向
  • 單程 /单程 (dānchéng)allowing travel in only one direction
  • 單向 /单向 (dānxiàng)allowing movement in only one direction
Czech jednosměrný
  • jednosměrnýallowing movement in only one direction
Finnish yksisuuntainen, yksisuuntainen
  • yksisuuntainenallowing travel in only one direction
  • yksisuuntainenallowing movement in only one direction
French aller simple, à sens unique
  • aller simpleallowing travel in only one direction
  • à sens uniqueallowing movement in only one direction
German einfach, unidirektional
  • einfachallowing travel in only one direction
  • unidirektionalallowing movement in only one direction
  • Einweg-allowing movement in only one direction
  • Einbahn-allowing movement in only one direction
Greek χωρίς επιστροφή, μονόδρομος
  • χωρίς επιστροφή (chorís epistrofí)allowing travel in only one direction
  • μονόδρομος (monódromos)allowing movement in only one direction
Hungarian egyirányú, egyirányú
  • egyirányúallowing travel in only one direction
  • egyirányúallowing movement in only one direction
Irish aontreo
  • aontreoallowing movement in only one direction
Italian senso unico
  • senso unicoallowing movement in only one direction
Japanese 片道, 一方通行
  • 片道 (katamichi)allowing travel in only one direction
  • 一方通行 (ippō tsūkō)allowing movement in only one direction
Korean 편도, 일방통행
  • 편도 (pyeondo)allowing travel in only one direction
  • 일방통행 (ilbangtonghaeng)allowing movement in only one direction
Latin irredux
  • irreduxallowing movement in only one direction
Māori ahutahi, ahutahi
  • ahutahiallowing travel in only one direction
  • ahutahiallowing movement in only one direction
Polish jednostronny, jednokierunkowy
  • jednostronnyallowing travel in only one direction
  • jednokierunkowyallowing movement in only one direction
  • jednostronnyallowing movement in only one direction
Portuguese sem retorno, de mão única
  • sem retornoallowing travel in only one direction
  • de mão únicaallowing movement in only one direction
Russian в оди́н коне́ц, в одну́ сто́рону
  • в оди́н коне́ц (v odín konéc)allowing travel in only one direction
  • в одну́ сто́рону (v odnú stóronu)allowing travel in only one direction
  • односторо́нний (odnostorónnij)allowing movement in only one direction
Swedish enkelriktad, enkelriktad
  • enkelriktadallowing travel in only one direction
  • enkelriktadallowing movement in only one direction
Cite this entry
APA

one-way. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/one-way

MLA

“one-way.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/one-way. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “one-way,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/one-way.

Source: one-way on Wiktionary, CC BY-SA 4.0.