Difference Between Idiom and Expression

When speaking, it is typical to hear phrases that are used frequently like “Beat around the bush”, “Challenge accepted”, etc.

These are only a few examples of people expressing their own views or thoughts; some use idioms, while others make up their own phrases.

As a result, the terms “idioms” and “expressions” are commonly used interchangeably and conflated. 

Idiom vs Expression 

The main difference between an idiom and an expression is that an idiom is an expression made with a combination of words that has a meaning that differs from the actual meaning, whereas an expression is a way or manner of expressing ideas or feelings through words. 

Idiom and

An idiom is a group of words that have a meaning that is different from the actual meaning of the words being used. It is made up of words, phrases, or expressions that can don’t reflect the literal meaning.

It is an example of figurative language. 

An expression can be defined as the act of expressing something or the process of making your views, feelings, etc., known by speech, writing, or any other medium. It might be regarded as a single word or as a phrase.

It’s a proper noun

Comparison Table Between Idiom and Expression 

Parameters of Comparison Idiom Expression 
Definition It is an expression made with the help of a combination of words with the meaning differing from the literal translation. They are a specific way of expressing ideas or feelings through words. 
Functionality They are not functional. They are functional. 
Understanding. Difficult to understand. Easier to understand. 
Considered as Colloquial metaphors. They are a polite way of saying a particular thing. 
Similarity They are all considered expressions. They are not all considered idioms. 
Meaning They don’t tend to reflect the literal meaning of the phrase. They often reflect the literal meaning. 

What is Idiom? 

The term “idiom” is defined as a tiny group of words with meanings that are wholly distinct from the meanings of the words that are being used.

It’s usually made up of words, phrases, or expressions that aren’t meant to be taken literally. It’s a figure of speech with a metaphorical connotation.

Furthermore, the figurative meaning of the words used in an idiom differs significantly from their literal meaning. 

The meanings of classic idioms have remained unchanged over time, making these expressions easy to comprehend.

Although some idioms have changing meanings, the majority of idioms in use today still have their original connotations. 

“A blessing in disguise” is an idiom that refers to a fortunate event that appeared to be unfavorable at first. Another example is “Beat about the bush,” which implies “to avoid saying what one really intends because it may be painful.” 

When specific words are joined, they form an idiom, which has a figurative meaning that differs from the literal definition of the separate words.

Let’s imagine something like, ‘Don’t worry, driving out to your house is a piece of cake.’ We would realize that the phrase “piece of cake” refers to a simple task.

Normally, we would not link the word ‘cake’ with anything other than dessert when it is used alone. However, it is a well-known idiom in this context. 

Figurative language, which includes the use of words in unexpected or innovative ways, includes idioms. 

What is Expression? 

‘An expression’ is described as a style or method of expressing thoughts through words. It is the act of expressing one’s thoughts or feelings through speech, facial expressions, and even body language.  

In general, an expression is similar to a phrase in that the words are combined to express or convey a feeling, an idea, or a notion. They’re also frequently referred to as ‘slangs.’ 

In comparison to an idiom, which can have multiple interpretations, one’s message will be easier to understand while using expressions.

Some argue that the native speaker’s location (country, state, city, etc.) has an impact on the use of idioms and expressions.  

The meaning of these terms can be influenced by the speech patterns or behaviors of those who use these idioms or expressions. 

“Challenge accepted” is an example of an English expression that signifies that someone is stating that they can complete whatever task is being discussed.  

Another example is “don’t put all your eggs in one basket,” which suggests having numerous possibilities rather than relying on just one. 

Main Differences Between Idiom and Expression 

  1. The term ‘idiom’ is used to refer to an expression made with the help of a combination of words with the meaning differing from the literal translation. On the other hand, the term ‘expression’ is used to refer to a specific way of expressing ideas or feelings through words. 
  2. Idioms serve to particular functionality and aren’t direct, whereas an expression tends to be functional and direct. 
  3. Idioms can be fairly difficult to understand, whereas an expression tends to be easier to understand. 
  4. An idiom can be considered a colloquial metaphor. An expression is considered to be a polite way of saying something. 
  5. All idioms can be considered expressions. On the other hand, all expressions are not considered idioms. 
  6. An idiom does not reflect the literal or actual meaning of the words or the phrase, whereas expressions usually tend to reflect the literal meaning behind the words. 
Difference Between Idiom and


Although both the terms are similar in their short sentence nature and usage, expressions are a bit broader than idioms. An idiom is a type of expression and is usually not predictable in its meaning,

whereas expressions have a direct and less literal meaning.  

Though ‘idioms’ can be used as ‘expressions’ while referring to a particular idea, not all ‘expressions’ can be used in the form of idioms. 

Idioms tend to be difficult to understand since they don’t have a direct meaning. On the other hand, expressions can be quite easy to understand since they have fairly direct meaning to their phrases. 


  1. http://www.academypublication.com/issues/past/tpls/vol02/06/tpls0206.pdf#page=126 
  2. http://thuvienso.bvu.edu.vn/handle/TVDHBRVT/15554 
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