Definition of hydrograph
1 : a mechanism for recording on a chart the changing level of water (as in a well, reservoir, stream)
2 : a chart produced by this mechanism
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of hydrograph
hydr- + -graph
Seen and Heard
What made you want to look up hydrograph? Please tell us where you read or heard it (including the quote, if possible).