垂直 means vertical (straight up and down) or perpendicular (at a 90-degree angle to something). Can function as a noun or na-adjective.
FORMS:
- 垂直な/の + noun: vertical ~
- 垂直に: vertically
COMMON EXPRESSIONS:
- 垂直に立つ: to stand vertically
- 垂直方向: vertical direction
- 垂直離着陸: vertical takeoff and landing (VTOL)
- 垂直落下: vertical drop/free fall
CONTRAST: