Homeostasis is when the situation or current state of things is not significantly changed or altered.
Imagine the situation where there is a man in the middle of the sea waiting for somebody to discover and rescue him. The homeostasis that the man will be working towards will be primarily to staying above the water and secondarily using as little energy as possible in kicking to stay a float. The three factors in this situation are gravity, water buoyancy, and kicking force of the man. The man will not be able to directly control the downward force of gravity but he can work against it by combining the upward forces caused by buoyancy and his kicking. By making sure that he is able to make-up for the downward force exerted by gravity with a combination of kicking with his feet and maximizing the buoyant effect of the water he will be able to stay a float and still use minimum effort. Thus he will be able to maintain homeostasis.
Based from the Greek words “homoios” and “stasis" meaning similar and standing still respectively. The term homeostasis is mostly used to describe scientific or technical systems because there is where the significance between homeostasis and not changing any of a system’s variables. Not changing any of a system’s variables would be like putting things to ice or stopping time, which is not what homeostasis is since homeostasis allows the system to continue to function, providing its standard out-puts while not exhausting itself.