Alternate Definitions for activation energy

Definition: The energy needed to pass over an energy barrier of some sort, often for atomic movement or a chemical reaction.

Example: A lower activation energy for lithium migration means lithium can travel more easily, making for a better battery electrolyte.

Definition: The minimum energy required for a chemical reaction to proceed from reactants to products.

Example: Increasing the temperature of a combustion reaction provides reactants with more kinetic energy, decreasing the activation energy and promoting ignition.

Definition: It is the the minimum amount of energy required for a particular reaction to proceed

Example: Energy of transition states, organic synthesis, kinetics