Falling is one of the single most commonly reported dreams anywhere in the world, and it's worth knowing the physiological piece before the folklore: a sudden falling sensation right as you're drifting off is often linked to a hypnic jerk, a real, harmless muscle twitch that happens during the transition into sleep. A lot of falling dreams are simply your body doing this, not a message.
With that said, Korean tradition, like most others, also reads falling symbolically — generally as a loss of control, anxiety about failing at something, or a sudden setback you're currently worried about. Falling and waking up before you land is the most common version, and interpreters generally treat it gently, closer to ordinary sleep physiology than a deep omen.
Falling and actually landing safely within the dream, rather than waking up mid-fall, is read as a feared setback turning out less damaging than you expected — you hit the ground and you're fine, which is a genuinely reassuring internal resolution.
Falling from a great height specifically, as opposed to a short trip or stumble, is read as a bigger fear underneath the dream — usually about losing status, reputation, or something you've built up over real time, rather than a minor daily worry.