the process or result of being gradually decomposed, a gradual decline in strength, quality, or importance

in a state of decay, decay into something, decay away

tooth decay, moral decay, urban decay

Formal and Informal Expressions of decay

In different contexts, you can replace 'decay' with suitable alternatives. In a more formal setting, 'decomposition, deterioration' is apt. In informal speech or writing, 'rot, breakdown' is a commonplace synonym.

decay: Explore its Definition & Usage

decay Definition

1the process or result of being gradually decomposed
2a gradual decline in strength, quality, or importance

Using decay: Examples

Take a moment to familiarize yourself with how "decay" can be used in various situations through the following examples!

Example
The decay of the old building was evident.
Example
The decay of the city's infrastructure has been a major concern for years.
Example
The decay of his health was rapid and alarming.
Example
The decay of their relationship was due to lack of communication.

decay Synonyms and Antonyms

Synonyms for decay

Antonyms for decay

Idioms Using decay

in a state of decay
in a condition of decline or deterioration
Example
The abandoned house was in a state of decay.
decay into something
gradually change into a worse or less desirable state
Example
The conversation decayed into an argument.
decay away
gradually disappear or be destroyed
Example
The old photographs were decaying away in the attic.

Phrases with decay

tooth decay
damage to a tooth caused by dental plaque turning sugars into acid
Example
Poor oral hygiene can lead to tooth decay.
moral decay
a decline in moral values or standards within a society or individual
Example
The rise of crime is a sign of moral decay in our society.
urban decay
the process whereby a previously functioning city, or part of a city, falls into disrepair and decrepitude
Example
The city's urban decay was due to a lack of investment in infrastructure.

Origins of decay

from Old French 'decair', meaning 'to fall down'

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Summary: decay in Brief

The term 'decay' [dɪˈkeɪ] refers to the gradual decomposition of something, as well as a decline in strength, quality, or importance. It can refer to physical objects like buildings or teeth, as well as abstract concepts like moral values or relationships. Examples include 'The decay of the old building was evident.' and 'The decay of his health was rapid and alarming.' Idioms like 'in a state of decay' and 'decay into something' describe the gradual worsening of a situation.