noun, noun or participle which takes 'suru', intransitive verb
A somewhat formal or literary noun for parting or separation. Often used in set phrases like 一別以来 (since we parted). The する form is intransitive and means 'to part' or 'to separate'.
一別以来、十年の歳月が流れた。
Ten years have passed since we parted.
I haven't seen him since we parted at the station.