(all) through (e.g. the night); throughout (e.g. the year); within (e.g. the week); in the course of (e.g. today); all over; throughout (e.g. the world)
Examples (2 in total)
火は家中に広がった。
The fire spread throughout the house.
家中探しまわったが気配もない。
I searched the whole house, but there was no sign of him.