going out to shop; going shopping
buying in quantity; buying wholesale; bulk purchasing
週末に食料の買い出しをした。
I went grocery shopping on the weekend.
キャンプの前に買い出しに出かけた。
We went out shopping before the camping trip.
買い出しの荷物が重すぎて一人では運べなかった。
The shopping was too heavy to carry on my own.