A transverse gap in a mountain ridge through which a stream or river flows.
- ‘We stopped at the Water Gap that night, and sat long on the wide veranda of the hotel, looking at the wonderful scene.’
- ‘I half-heartedly jumped my car over the water gap.’
- ‘Poplar Creek Bluff is a steep, southwest-facing slope in the water gap that bisects Blackoak Ridge.’
- ‘There's still a very large water gap to be crossed.’