'广播' (guǎng bō) literally combines '广' (guǎng), meaning 'wide' or 'broad', and '播' (bō), meaning 'to sow' or 'to spread'. Together, they convey the idea of 'spreading widely' — hence, 'radio broadcast' as a noun, and 'to broadcast' as a verb. It refers specifically to audio transmissions sent over radio waves, though it can also be used more broadly for public announcements (e.g., over loudspeakers in schools or stations). Unlike '电视' (diànshì, television), which is visual, '广播' is strictly auditory.

This word is commonly used in formal and institutional contexts: national radio networks (e.g., China National Radio), emergency alerts, school morning announcements, and traffic updates. As a verb, it's often followed by an object (e.g., 广播新闻 — 'broadcast news') and may appear in passive constructions using 被 or 由. It’s neutral in register — appropriate in both written reports and everyday speech when referring to official or mass audio communication.