subdivision
noun uk/ˈsʌb.dɪˌvɪʒ.ən/ /ˌsʌb.dɪˈvɪʒ.ən/ us/ˈsʌb.dɪˌvɪʒ.ən/ /ˌsʌb.dɪˈvɪʒ.ən/
[ C or U ]分支;分部;细分部分;再分，细分
any of the parts into which something is divided, or the act of creating these
Each category has several subdivisions. 每一个种类又有几个分支。
They agreed that subdivision of the house into apartments would be a good idea. 他们都认为将整幢房子分成几个房间是个好主意。
[ C ] US (UK housing estate)（统建的）住宅区，住宅群
an area containing a large number of houses or apartments built close together at the same time