Having become or been made hard or solid. The lava cooled into a hardened crust.
Having developed a strong resistance or immunity to something, often due to repeated exposure. After years of working in the harsh environment, he became hardened to the extreme conditions.
Having a tough or unfeeling character, often as a result of difficult experiences. The detective was a hardened veteran of the force, unfazed by the gruesome crime scenes.
Firmly established or habitual; unlikely to change. He was a hardened smoker who lit a cigarette every hour.
To make or become hard or harder. The clay will harden if left out in the sun.
To make or become more severe or less sympathetic. The judge's attitude began to harden as the trial progressed.
To become more determined or resolute. His resolve to finish the marathon hardened with each passing mile.
To make or become more resistant to difficult conditions. The soldiers were trained to harden themselves against the harsh weather.
(of prices, markets, or rates) To rise or become firmer after a period of weakness. Share prices hardened during afternoon trading.