Implosion is the collapse of an object into itself from a pressure differential or gravitational force. Learn about the examples of implosion in nuclear weapons, fluid dynamics, astrophysics, and more. The meaning of IMPLOSION is the action of imploding. How to use implosion in a sentence. Other articles where implosion is discussed: atomic bomb: The properties and effects of atomic bombs: …method used is that of implosion, in which a core of fissionable material is suddenly compressed into a smaller size and thus a greater density; because it is denser, the nuclei are more tightly packed and the chances of an emitted neutron’s striking a nucleus are increased. The core of… Implosion involves a collapsing inward movement of material, often caused by external forces or pressure, while explosion is the rapid outward release of energy, resulting in the scattering of materials from a central point.