noun
one year and a half; a year and a half
Common temporal noun used to express a duration of 18 months.
このプロジェクトは一年半かかりました。
This project took a year and a half.
一年半ぶりに故郷へ帰った。
I returned to my hometown for the first time in a year and a half.
Compound of 一年 (one year) and 半 (half).