expression, ichidan verb
set up a branch shop; allow a trusted employee to open a branch
Idiomatic expression from the practice of a master allowing a long-term apprentice to use the same shop curtain (のれん) and name to open a branch. Implies trust and recognition of skill.
彼は長年修業した後、師匠にのれんを分けてもらった。
After many years of apprenticeship, his master allowed him to set up a branch shop.
のれんを分けることは、単に店を出す以上の意味がある。
Setting up a branch under the same shop name carries more meaning than simply opening a store.