导弹 (dǎo dàn) literally means 'guiding projectile' — 导 (dǎo) means 'to guide' or 'to direct', and 弹 (dàn) means 'projectile' or 'shell'. Together, they refer specifically to a guided missile: a self-propelled weapon system equipped with guidance mechanisms (like radar, GPS, or infrared) that can adjust its flight path to hit a designated target. Unlike unguided rockets or artillery shells, missiles are precision weapons designed for accuracy over long distances.

This term is used in military, defense, and geopolitical contexts — for example, when discussing national security, arms control treaties, or news reports about missile tests or defense systems. It appears frequently in formal writing, news media, and technical documents, but rarely in casual daily conversation. While it may occasionally appear metaphorically (e.g., in tech or business jargon), such usage is uncommon and not standard.