1Every month; happening once each month without exception. Usually read 'まいつき' in speech; 'まいげつ' also appears often in formal or written contexts.
給料は毎月25日に支払われる。
Salaries are paid on the 25th of every month.
このマンションは毎月の管理費がかかる。
This apartment has a monthly management fee.
彼は毎月本を3冊読むと決めている。
He has decided to read three books every month.
毎月の会議は月末に行われる。
The monthly meeting is held at the end of the month.