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

The bacteria live on food particles and produce acid that decays the enamel on your teeth. The flesh on a dead body decays very rapidly. It's sad to watch a beautiful rose wither and decay in such a short …

Look up decay in Wiktionary, the free dictionary.

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 · decay (third-person singular simple present decays, present participle decaying, simple past and past participle decayed) (intransitive) To deteriorate, to get worse, to lose strength or …

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 …

Explanation To decay means to rot, decompose, break down. Our bodies—anything organic—will decay after death. Broken sidewalks, potholes, graffiti are all signs of urban decay. Tooth decay is …

Some species rapidly change colour, and cause the decay of any others with which they come in contact. From this time forward the city began to decay. Though rebuilt, the building fell into decay …

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