decay, decompose, rot, putrefy, spoil mean to undergo destructive dissolution. decay implies a slow change from a state of soundness or perfection.

DECAY definition: 1. to become gradually damaged, worse, or less; to cause something to do this: 2. If a radioactive…. Learn more.

Decay has wide application but often suggests partial deterioration short of complete destruction: "A decaying dam is an accident waiting to happen" (George Black).

Definition of decay noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Apr 15, 2026 · Noun decay (usually uncountable, plural decays) (biology) Rot; any processes or result of organic matter being gradually decomposed, especially by microbial action.

Decay, decompose, disintegrate, rot imply a deterioration or falling away from a sound condition. Decay implies either entire or partial deterioration by progressive natural changes: Teeth decay.

DECAY definition: to become decomposed; rot. See examples of decay used in a sentence.

Decay refers to the process of gradual degradation, breakdown, or destruction of an object, substance, or system. This term can be used in various contexts such as biology, physics, and even societal …

Decay definition: To decrease in orbit. Used of an artificial satellite.

Decay is also a noun. When not removed, plaque causes tooth decay and gum disease.