embankment

n. dike, raised mound of earth, earthwork, rampart (for defense, protection, holding back water, etc.)

Embankment may refer to:A levee or dike (construction), an artificial bank raised above the immediately-surrounding land to redirect or prevent flooding by a river, lake or seaEmbankment (transportation), in transportation, a raised bank to carry a road, railway, or canal across a low-lying or wet areaEmbankment dam, a dam made of mounded earth and rockEmbankment tube station, a station on the London Underground
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Noun
1. a long artificial mound of stone or earth; built to hold back water or to support a road or as protection
(hypernym) mound, hill
(hyponym) rampart, bulwark, wall
(part-meronym) revetment, revetement, stone facing
(derivation) embank

(n.)
The act of surrounding or defending with a bank.
  

(n.)
A structure of earth, gravel, etc., raised to prevent water from overflowing a level tract of country, to retain water in a reservoir, or to carry a roadway, etc.
  

A raised structure of earth, ground, etc. (DOI4)