1. To reduce, modify or moderate by mixture; as, to attemper heat by a cooling mixture, or spirit by diluting it with water.

2. To soften, mollify or moderate; as, to attemper rigid justice with clemency.

3. To mix in just proportion; to regulate; as, a mind well attempered with kindness and justice.

4. To accommodate; to fit or make suitable.

Arts attempered to the lyre.