Resonance Stabilization Definition:
Resonance stabilization is the stabilization offered due to the delocalization of electrons in a molecule.
Resonance Stabilization Explained:
Resonance happens in the initiation of delocalization in which the overall energy of an atom is lowered since its electrons occupy a greater volume. Therefore, the molecules that experience resonance are more stable than those that do not and are termed resonance stabilized.
Notice the spreading of charge. This stabilizes the molecule as the overall energy of the molecule reduces.