1.
one serving; one portion (for one person)
Used when ordering or describing food quantities.
ラーメン一人前ください。
One serving of ramen, please.
一人前の量が多すぎて食べきれなかった。
One serving was too much and I couldn't finish it.
この店は一人前の量がとても多いので、二人で一人前を分けて食べた。
This restaurant's servings are very large, so two of us split one serving.
2.
full-fledged; fully qualified; independent adult
Describes someone who has become competent or grown into a capable adult.
一人前になりたい。
I want to become a full-fledged adult.
やっと一人前の社会人になれた。
I've finally become a full-fledged member of society.
まだ半人前だけど、いつか一人前の職人になりたい。
I'm still only half-qualified, but someday I want to become a fully-fledged craftsman.
子どものくせに一人前の口を利くな。
Don't talk like a grown-up when you're just a child.
一人前の口を利く is a set expression meaning to speak as if one were a competent adult.
十年修行して、やっと一人前と認められた。
After ten years of training, I was finally recognized as fully qualified.
一人前 has two related meanings.
SENSE 1 - FOOD PORTIONS:
- 一人前 - one serving
- 二人前 - two servings
- 三人前 - three servings
SENSE 2 - FULLY QUALIFIED:
- 一人前になる - to become full-fledged
- 一人前の職人 - a fully qualified craftsman
- まだ半人前 - still only half-qualified
EXPRESSION:
- 一人前の口を利く - to talk like a grown-up