a shaft sharpened at the front and with feathers or vanes at the back, shot from a bow as a weapon or for sport:his ability to launch an arrow accurately
a mark or sign resembling an arrow, used to show direction or position; a pointer:we drove in the main gate and followed a series of arrows [as modifier]:you can use the up and down arrow keys
Phrases
arrow of time (or time's arrow)
the direction of travel from past to future in time considered as a physical dimension.
