1. plural of excitation; the act or process of exciting or stimulating something or someone
Usage: commonly used in scientific and technical contexts
2. in physics and chemistry, the state of an atom, molecule, or nucleus when it has absorbed energy and moved to a higher energy level
Usage: technical; used in physics and chemistry
3. in physiology, the triggering of a nerve or muscle cell to respond or contract
Usage: technical; used in biology and medicine

Examples

• The excitations of the audience grew louder as the concert reached its climax.
• Electron excitations in the material cause it to emit light.
• The drug produces neural excitations that affect mood and behavior.
• Scientists studied the excitations of atoms in the laser beam.
• Muscle excitations are controlled by electrical signals from the brain.
• The excitations of the crowd made it difficult to hear the speaker.
• In quantum mechanics, excitations represent transitions to higher energy states.