A room or small building where people on duty (guards, police, firefighters, workers) wait or assemble. Often used for a guard post, a police box, or a duty room in a workplace.
The security guard is on standby in the guardroom.
There were two police officers in the police box.
Standard kanji spelling with okurigana; common in news and everyday use.
Abbreviated kanji spelling without okurigana; also seen but less common.
Compound of 詰め (つめ, 'stuffing' or 'being on duty', from 詰める) and 所 (しょ, 'place'). Literally 'a place where one is stationed'.