Learn how to use the comparative “cooler” and superlative “coolest” with example sentences and differences.

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Notes from a Native English Speaker

Comparative adjectives help us to describe how good or bad something is when compared to something else. For example, something is taller than something else. Superlative adjectives help us to describe something as having the most or least of a particular characteristic within a group. This makes it easier and more accurate to talk about and compare things.

What is the comparative form of “cool”?

The comparative form of “cool” is “cooler”.

Example

The weather today is cooler than yesterday.

Example

She wore a cooler outfit to the party.

What is the superlative form of “cool”?

The superlative form of “cool” is “coolest”.

Example

Among all the seasons, winter is the coolest.

Example

He has the coolest car in town.

Why is this expression not used with most, more?

'Most' and 'more' are generally not used with cool, cooler, and coolest. They’re considered regular comparatives and superlatives. The forms 'more cool' and 'most cool' are not used because they sound awkward. Instead, cooler and coolest are the correct and preferred forms to use.

Does this expression have an irregular comparative/superlative form?

Cool does not have an irregular comparative or superlative form. It follows the standard pattern for forming comparatives and superlatives. So, to summarize: Comparative: CoolCooler Superlative: CoolCoolest

Expressions with similar meanings to “cooler”

Used to describe something that is colder in temperature

Example

The chillier air made her shiver.

Used to describe something that is colder in a more intense or icy way

Example

The frostier temperatures turned the water into ice.

A slightly formal way of expressing increased coolness or refreshment

Example

The more refreshing drink helped cool her down on a hot day.

Expressions with similar meanings to “coolest”

Similar to coolest, this emphasizes both coldness and a relaxed or laid-back vibe

Example

The ice-cold lemonade was the chillest drink on a hot summer day.

Used to describe the highest level of coldness in a more intense or icy way

Example

The frostiest temperatures of the year are usually in January.

A slightly formal way of expressing the highest level of coolness or refreshment

Example

The most refreshing breeze came from the ocean.

Using than with comparative “cooler”

When using the comparative form cooler to compare two things, you would use than to connect the two parts of the comparison: Example: "This room is cooler than the one upstairs." Here, than is used to show that the temperature of 'this room' is lower than the temperature of the room upstairs.

How can I use this expression in context?

“cooler” and “coolest” can be used in a variety of situations to compare speed.
  • 1Weather

    The evenings are getting cooler as autumn approaches.

    The evenings are getting cooler as autumn approaches.

  • 2Fashion

    She always wears the coolest clothes.

    She always wears the coolest clothes.

  • 3Technology

    The new smartphone has the coolest features.

    The new smartphone has the coolest features.

  • 4Popularity

    He is the coolest kid in school.

    He is the coolest kid in school.

  • 5Attitude

    She has the coolest demeanor in stressful situations.

    She has the coolest demeanor in stressful situations.

Related idioms and phrases

As cool as a cucumber

To remain calm and composed, especially in difficult or stressful situations.

Example

Even though everyone else was panicking, she stayed as cool as a cucumber.

Cool your jets

To calm down or relax.

Example

He was getting too worked up, so I told him to cool his jets.

Cool beans

An expression of approval or agreement.

Example

A: "I got us tickets to the concert." B: "Cool beans!"

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