post office box (English, noun)
expansion: post office box (plural post office boxes)
Senses:
glosses: A uniquely addressable lockable box located on the premises of a post office that may be hired as collection point for mail.
topics: business
electrical-engineering
electricity
electromagnetism
energy
engineering
natural-sciences
physical-sciences
physics
glosses: A test instrument once used by telephone engineers.
Forms:
form: post office boxes
tags: plural
form: post-office box
tags: alternative