Definition
Indicates the complete absence of anything.
什么都没有
I searched the entire room, but I didn't find a single thing.
我搜遍了整个房间，但没有找到任何东西。
He opened the refrigerator and found not a single thing inside.
他打开冰箱，发现里面没有任何东西。
I checked my pockets, and there wasn't a single thing in them.
我检查了我的口袋，里面没有任何东西。