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.
一遍やってみて。
Try it once.
一遍会ったことがある。
I've met them once.
一遍でいいから本場のピザを食べてみたい。
I'd like to try authentic pizza just once.
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.
一遍に片付けよう。
Let's take care of it all at once.
そんなに一遍に食べたらお腹を壊すよ。
If you eat that much all at once, you'll upset your stomach.
荷物を一遍に運ぶのは無理だ。
It's impossible to carry the luggage all in one go.
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)
NOTE:
Do not confuse with the homophone 一変 (complete change), which has a completely different meaning.