Time and effort required to do a task; labor or trouble involved.
この料理は手間がかかるが、とても美味しい。
This dish takes a lot of work, but it's very delicious.
手間を省くために機械を導入した。
We introduced machines to reduce the amount of labor.
その作業は手間が少なく効率的だ。
That task requires little effort and is efficient.