Merriam-Webster's Collegiate® Dictionary, 11th Edition
APART
I. adverb
Etymology: Middle English, from Anglo-French a part, literally, to one side
Date: 14th century
1. at a little distance , away from one another in space or time ,
2. as a separate unit ; independently , so as to separate one from another , excluded from consideration ; aside , in or into two or more parts ; to pieces ,
II. adjective
Date: 1728
separate , isolated , holding different opinions ; divided , apartness noun