Question

define an isolated system in physics

Answer 1

An isolated system is either of the following:

A physical system so far removed from other systems that it does not interact with them.

A thermodynamic system enclosed by rigid immovable walls through which neither mass nor energy can pass.

Answer 2

${\huge{\blue{\bold{ISOLATED\:SYSTEM}}}}$

a system in which the mass and it's total energy stay constant is called an isolated system in other words the system which do not interact with its surrounding is called an

${\red{\bold{ISOLATED\:SYSTEM}}}$