1. to convert (an atom or molecule) into an ion by adding or removing electrons
Usage: chemistry; physics
2. to become converted into ions
Usage: chemistry; physics

Examples

• High-energy radiation can ionize atoms in the atmosphere.
• The salt will ionize when dissolved in water.
• X-rays ionize the gas molecules they pass through.
• Strong acids ionize completely in aqueous solution.
• The electric field was strong enough to ionize the air.
• Heat causes some gases to ionize at high temperatures.