What does dike mean?
A dike is an embankment or wall of earth, stone, or concrete built to prevent flooding, particularly along coastlines and riverbanks where low-lying land must be protected from water. The word is closely associated with the Netherlands, where an elaborate network of dikes has allowed people to live and farm on terrain below sea level for centuries. In American English 'dike' is the standard spelling, while British English more often uses 'dyke'; the two spellings are interchangeable. Beyond civil engineering, dike also has a precise geological meaning: a tabular body of igneous rock that has forced its way upward through a crack in pre-existing rock, often appearing as a striking wall-like feature in exposed cliff faces. A third, older sense refers to a drainage ditch or channel. The verb form means to enclose, protect, or drain land by constructing such embankments.
An embankment or wall built to prevent flooding of low-lying land, especially beside the sea or a river.
"The villagers worked together to strengthen the dike before high tide arrived."
Also refers in geology to a sheet of igneous rock intruded into older rock, and less commonly to a drainage ditch.
To enclose, protect, or drain land by building a dike around it.
"Farmers have been diking these marshes for pastureland since the seventeenth century."
Standard plural; the variant spelling 'dykes' follows the same pattern.
"A network of ancient dikes protects the island from storm surges."
The Netherlands' famous dikes hold back the North Sea from land that would otherwise be underwater — much of the country literally lives below sea level thanks to them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dike
The word dike derives from Old English 'dīc', meaning a ditch or embankment, which itself comes from Proto-Germanic '*dīkaz'. Cognates appear throughout the Germanic languages — Dutch 'dijk', German 'Teich' (pond), and Danish 'diget' — all ultimately tracing back to the same root as English 'ditch'. The sense evolved over time from a dug channel to its opposite: an artificial bank raised against water, reflecting the dual nature of water management in low-lying northern Europe.
Related word forms
How dike is actually used
The spelling 'dike' is standard in American English, while 'dyke' is more common in British English; both are acceptable in either variety. The word carries no strong connotation — it is neutral and technical in most contexts. In geology it has a precise technical sense unrelated to flood control.
Easily confused with dike
Dyke is simply a variant spelling of dike with identical meanings, though in modern usage dyke is also used as a slang term (sometimes reclaimed) for a lesbian, which dike is not typically used to convey.