Definitions for "Water hole"
The radio interval between 18 cm and 21 cm, the wavelengths at which hydroxyl (OH) and hydrogen (H) radiate, respectively, in which intelligent civilizations might conceivably send their communication signals.
A hole with water that golfers must hit the ball over.
a natural hole or hollow containing water
a place where people congregate to tell stories of people and events that happened long ago, so that they will not be forgotten