1. the branch of science and technology concerned with the mechanical properties of liquids and their application in engineering
Usage: technical
2. a system of machinery operated by liquid pressure, especially water or oil

Examples

• The engineer studied hydraulics to design better water systems.
• Modern construction equipment relies heavily on hydraulics.
• The car’s hydraulics allowed the driver to raise and lower the vehicle.
• Hydraulics principles are used in dam construction.
• The airplane’s landing gear operates using hydraulics.
• Students learn about hydraulics in mechanical engineering courses.