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.
料理は二人前頼みましょう。
Let's order two servings of the dish.
2.
full-fledged; fully qualified; independent adult
Describes someone who has become competent or grown into a capable 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.
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