We solidify and define where solidification means loss of interest; and loss of interest, not years, is old age.
"Adventures In Contentment"
David Grayson AKA: Ray Stannard Baker
Drying oils, as linseed, absorb O from the air, and thus solidify.
"An Introduction to Chemical Science"
R.P. Williams
This cosmic gas, in the course of time, began to lose its heat, and consequently to liquefy and solidify, according to the different nature of its components; and thus a globe with a solid crust was formed, the surface of which was partly dry and partly occupied by water, and diversified by the abundant production of the various earths, gases, metals, and other substances with which we are familiar.
"Creation and Its Records"
B.H. Baden-Powell