subdivision

noun

1. 1

   the act of subdividing; division of something previously divided

2. 2

   a section of a section; a part of a part; i.e., a part of something already divided

3. 3

   a self-contained part of a larger composition (written or musical)

   he always turns first to the business section

   the history of this work is discussed in the next section

4. 4

   a division of some larger or more complex organization

   a branch of Congress

   botany is a branch of biology

5. 5

   an area composed of subdivided lots