If a river or other area of water runs dry, the water gradually disappears from it.

By this time all the wells had run dry. 到这个时候所有的井都已经干枯了。

In some places, drought has caused the river to run dry.

This time last year, water reserves were worryingly low and some rivers had run dry.

The rains have failed to come and rivers are now running dry.

One day this stream will run dry.

Conservationists were monitoring the state of the lake's wildlife as it ran dry.

See also: dry adjective (NOT WET)