Definition of induration :
1. Hardness of character, manner, sensibility, etc.; obduracy; stiffness; want of pliancy or feeling.
2. State of being indurated, or of having become hard.
3. The act of hardening, or the process of growing hard.
- In Polonius a certain induration of character had arisen from long habits of business; but take his advice to Laertes, and Ophelia's reverence for his memory, and we shall see that he was meant to be represented as a statesman somewhat past his faculties,- his recollections of life all full of wisdom, and showing a knowledge of human nature, whilst what immediately takes place before him, and escapes from him, is indicative of weakness. - "Literary Remains, Vol. 2", Coleridge.
- The lip is swollen and everted, and there is a considerable area of induration around. - "Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition.", Alexander Miles Alexis Thomson.
- Continuation of the processes of induration produces subbituminous coal, or black lignite, which is usually black and sometimes has a fairly bright luster. - "The Economic Aspect of Geology", C. K. Leith.