What is Apart ?
Apart is (adv) 1. separated The two churches are about six miles apart. 2. not together They were married but now they’re living apart. 3. in separate pieces He took the watch apart. the watch came apart the watch opened into pieces 4. to tell something, someone apart to realise how two things or people are different The twins are very alike can you tell them apart?
source: Easier English, Student Dictionary Upper Intermediate Level