Definition of "standpipe"

A vertical pipe into which water is pumped so that a desired pressure is available at the bottom.

1. (by extension) A vertical pipe used as an overflow protection drain in certain domestic plumbing fixtures (e.g. flush toilets).  examples

The water supply of a building for the use of firefighters.  examples

A freestanding pipe fitted with a tap which is installed outdoors to dispense water.  examples