Definition
Refers to a time a few days in the past; not very long ago.
前几天
I saw you at the library the other day.
我前几天在图书馆看到你。
She called me to say hello the other day.
她前几天打电话来跟我打招呼。
We bumped into each other at the coffee shop the other day.
我们前几天在咖啡厅巧遇。