Suspension is a term used in different fields, including chemistry and automotive engineering. In chemistry, a suspension is a heterogeneous mixture of a fluid that contains solid particles sufficiently large for sedimentation). The particles are visible to the naked eye and do not dissolve but get suspended throughout the bulk of the solvent, left floating around freely in the medium. The internal phase (solid) is dispersed throughout the external phase (fluid) through mechanical agitation, with the use of certain excipients or suspending agents). Examples of suspensions include sand in water, muddy water, and milk of magnesia.

In automotive engineering, suspension refers to the system of springs, shock absorbers, and linkages that connects a vehicle to its wheels and allows relative motion between the two. The suspension system serves a dual purpose, contributing to the vehicles handling and braking for good active safety and driving pleasure, and keeping vehicle occupants comfortable and reasonably well isolated from road noise, bumps, and vibrations. There are different types of suspension systems, including non-independent suspension, MacPherson Strut Suspension, Double Wishbones Suspension, Torsion Beam Suspension, and multi-link rear suspension.

In summary, suspension is a term used to describe a heterogeneous mixture of a fluid that contains solid particles sufficiently large for sedimentation in chemistry, and a system of springs, shock absorbers, and linkages that connects a vehicle to its wheels and allows relative motion between the two in automotive engineering.