Noun | 1. | hardening - abnormal hardening or thickening of tissue symptom - (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease callosity, callus - an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) calcification - tissue hardened by deposition of lime salts |
2. | hardening - the process of becoming hard or solid by cooling or drying or crystallization; "the hardening of concrete"; "he tested the set of the glue" congealment, congelation - the process of congealing; solidification by (or as if by) freezing natural action, natural process, action, activity - a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity" plastination - a process involving fixation and dehydration and forced impregnation and hardening of biological tissues; water and lipids are replaced by curable polymers (silicone or epoxy or polyester) that are subsequently hardened; "the plastination of specimens is valuable for research and teaching" | |
3. | hardening - the act of making something harder (firmer or tighter or more compact) change of integrity - the act of changing the unity or wholeness of something |