[ hahy-drog-ruh-fee ]
/ haɪˈdrɒg rə fi /


the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
those parts of a map, collectively, that represent surface waters.

Origin of hydrography

First recorded in 1550–60; hydro-1 + -graphy
Related formshy·drog·ra·pher, nounhy·dro·graph·ic [hahy-druh-graf-ik] /ˌhaɪ drəˈgræf ɪk/, hy·dro·graph·i·cal, adjectivehy·dro·graph·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hydrographic

British Dictionary definitions for hydrographic (1 of 2)


/ (ˌhaɪdrəˈɡræfɪk) /


of or relating to hydrographics
Derived Formshydrographical, adjectivehydrographically, adverb

British Dictionary definitions for hydrographic (2 of 2)


/ (haɪˈdrɒɡrəfɪ) /


the study, surveying, and mapping of the oceans, seas, and riversCompare hydrology
the oceans, seas, and rivers as represented on a chart
Derived Formshydrographer, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hydrographic



1550s, from hydro- + -graphy. Related: Hydrographic

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for hydrographic


[ hī-drŏgrə-fē ]

The scientific description and analysis of the physical characteristics of Earth's surface waters, including temperature, salinity, oxygen saturation, and the chemical content of water. Oceanography (the study of saltwater bodies) and limnology (the study of freshwater bodies) are subsets of hydrography.
The mapping of bodies of water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.