- the study, description, and mapping of oceans, lakes, and rivers, esp. with reference to their navigational and commercial uses
- the oceans, lakes, rivers, etc. of a region, esp. as dealt with on a map or in a survey, treatise, etc.
Origin of hydrographyFrench hydrographie: see hydro- and amp; -graphy
- The scientific description and analysis of the physical conditions, boundaries, flow, and related characteristics of the earth's surface waters.
- The mapping of bodies of water.
(countable and uncountable, plural hydrographies)
hydro- + -graphy