main office; headquarters; this office
Often refers to a police station's main office or headquarters. Can also mean 'this office' in formal or bureaucratic contexts.
The investigation of the case was transferred to the main office.
This office provides security around the clock.
Compound of 本 (main, this) and 署 (office, station). The exact historical derivation is uncertain, but the kanji combination is conventional for 'main office' or 'this office'.