Wiktionary

1. one day(Adverb)

   At some unspecified time in the future.

2. one day(Adverb)

   At some unspecified time in the past.

Dictionary of Military and Associated Terms

1. one day

   A unit or quantity of supplies adopted as a standard of measurement, used in estimating the average daily expenditure under stated conditions. It may also be expressed in terms of a factor, e.g., rounds of ammunition per weapon per day.

• een dag, eendag, eenmaalAfrikaans
• يَوْما ماArabic
• някой денBulgarian
• algum diaPortuguese (BR)
• jednoho dneCzech
• eines TagesGerman
• en dagDanish
• κάποτε στο μέλλονGreek
• algún díaSpanish
• ühel heal päevalEstonian
• روزیFarsi
• jonain päivänäFinnish
• un jour (ou l'autre)French
• יוֹם אֶחָדHebrew
• एक दिनHindi
• jednog danaCroatian
• majd egyszerHungarian
• kelakIndonesian
• einhvern daginn, einhvern tímaIcelandic
• un giornoItalian
• いつかJapanese
• (미래) 언젠가Korean
• kada norsLithuanian
• kādreizLatvian
• suatu hari nantiMalay
• ooit eensDutch
• en dag, en gangNorwegian
• kiedyś, któregoś dniaPolish
• روزیPersian
• ورځیPashto
• algum diaPortuguese
• într-o ziRomanian
• когда-нибудьRussian
• razSlovak
• nekega dneSlovenian
• jednog danaSerbian
• en dag, en gångSwedish
• วันหนึ่ง (ในอนาคต)Thai
• bir gün, günün birindeTurkish
• (將來的)某一天Chinese (Trad.)
• колисьUkrainian
• زمانئہ مستقبل میں کسی وقتUrdu
• ngày nào đóVietnamese
• （将来的）某一天Chinese (Simp.)