1.
once; one time
A slightly casual way of saying 'once' or 'one time,' more colloquial than 一度 or 一回. Particularly common in Kansai dialect but widely understood throughout Japan.
2.
all at once; in one go
Used in the pattern 一遍に to mean doing something all at once rather than in stages or portions, such as carrying everything in a single trip or eating all the food at the same time.
A slightly casual adverb meaning "once" or "all at once." More colloquial than 一度 or 一回. Particularly common in Kansai dialect but widely understood across Japan. Sense 2 (一遍に) means doing something all at once rather than in stages.
Common patterns
- 一遍 + verb: once; one time (sense 1)
- 一遍に: all at once; in one go (sense 2)
- 一遍でいいから: just once (emphatic wish)
Similar words
- 一度 — once (standard, slightly more formal)
- 一回 — one time (neutral, most common)
- 一気に — in one breath; at a stretch (emphasizes speed/intensity more than 一遍に)
Usage
Do not confuse with the homophone 一変 (complete change), which has a completely different meaning.