Share this entry

Share this page


Syllabification: hy·drau·lic
Pronunciation: /hīˈdrôlik

Definition of hydraulic in English:


1Denoting, relating to, or operated by a liquid moving in a confined space under pressure: hydraulic fluid hydraulic lifting gear
More example sentences
  • After we shot down the catapult, we saw a sheen of hydraulic fluid covering the pressure bulkhead in the back of the aircraft.
  • That includes using non-toxic hydraulic oils for his machinery, and synthetic engine oils all around in the hopes of reducing maintenance downtime.
  • Until now, conventional hydraulic oil would break down sooner, leaving your machine's metal abrasively scraping against metal.
2Of or relating to the science of hydraulics.
Example sentences
  • The eleven imperial water mill visits testify to the founders' keen interest in the science of hydraulic engineering.
  • Mitchell reports that further hydraulic analysis will be conducted within the next two weeks by the Water Resources Hydrology department.
  • Anatomical measurements were done on samples previously used for the analysis of hydraulic parameters.
3(Of cement) hardening under water.
Example sentences
  • If you see cracks in the walls leaking, some of these can be repaired with hydraulic cement or crack injection.
  • Nevertheless, Henry knew research was expected of him, and he began investigating the chemical reactions involved in the setting of hydraulic cements.


early 17th century: via Latin from Greek hudraulikos, from hudro- 'water' + aulos 'pipe'.



Pronunciation: /-(ə)lē/
Example sentences
  • A hydraulic hammer is basically a hydraulically powered reciprocating piston inside of a body.
  • It's essentially a manual gearbox; the engine's torque is transferred mechanically, rather than hydraulically as in an automatic transmission.
  • The wheels are fitted with dual circuit hydraulically operated disc brakes and anti-skid braking.

Definition of hydraulic in:

Share this entry

Share this page


What do you find interesting about this word or phrase?