is not constant

USAGE SUMMARY

The phrase "is not constant" is correct and usable in written English.
It can be used to describe something that changes or varies over time or under different conditions. Example: "The temperature in this region is not constant, fluctuating significantly between seasons."

✓ Grammatically correct

Science

News & Media

Encyclopedias

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

In extreme cases survival curves intersect and the hazard ratio is not constant.

BMC Medical Research Methodology

The current is not constant.

The New Yorker

Electricity demand is not constant.

The Guardian

The definition of want is not constant.

Encyclopedia Britannica

But it holds a lesson: language is not constant.

The Economist

And contrary to what people have thought, it is not constant.

The Guardian

I certainly watch that in myself, because work is not constant.

The Guardian

"The world is not constant, it's always changing," said Kazuto Ohira, the play's producer.

The New York Times - Arts

"Now we realize that gravity is not constant and is continually changing".

The New York Times - Science

Or it could turn out that it has changed over cosmic time and is not constant.

The New York Times - Science

In fact, even the value of debt itself is not constant.

The Guardian - Opinion

Expert writing Tips

Best practice

When using "is not constant", ensure the context clearly indicates what factor is causing the variability. Providing specific examples of how it changes enhances clarity.

Common error

Avoid using "is not constant" without specifying the relevant variable or condition that influences the change. Without context, the statement becomes vague and less informative.

Linguistic Context

The phrase "is not constant" functions as a descriptor or qualifier, indicating that a particular attribute, condition, or variable is subject to change. Ludwig provides numerous examples across diverse fields, supporting its widespread usage.

Expression frequency: Very common

Frequent in

Science

69%

News & Media

22%

Encyclopedias

7%

Less common in

Formal & Business

0%

Wiki

2%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "is not constant" serves to express variability across a wide array of subjects. As indicated by Ludwig, this phrase is grammatically sound and highly prevalent in various contexts, particularly science and news. When employing "is not constant", ensure you are adding value by indicating what's causing the variability and how to interpret the changes, and by avoiding ambiguity for the sake of clarity. "Is not constant" communicates effectively when it's clear what influences the change and what it matters.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

is variable

Emphasizes the changing nature of something.

varies

A general term for changing or differing.

is not fixed

Highlights the lack of a set or permanent state.

is not stable

Focuses on the lack of steadiness or consistency.

is dynamic

Implies active and continuous change.

is subject to change

Indicates that something is likely to be altered or modified.

is inconsistent

Suggests a lack of uniformity or predictability.

is inconstant

Highlights the unreliability and changeability.

fluctuates

Describes irregular variations or oscillations.

is mutable

Emphasizes the ability to be changed.

FAQs

How can I use "is not constant" in a sentence?

You can use "is not constant" to describe anything that changes or varies over time or under different conditions. For example, "The temperature in this region "is not constant", fluctuating significantly between seasons."

What can I say instead of "is not constant"?

You can use alternatives like "is variable", "is inconsistent", or "is dynamic" depending on the context.

When is it appropriate to use "is not constant"?

Use "is not constant" when you want to emphasize that something changes or fluctuates, rather than remaining the same. It's suitable for describing trends, conditions, or measurements that vary over time.

What is the difference between "is not constant" and "is not consistent"?

"Is not constant" implies a change over time or conditions, while "is not consistent" suggests a lack of uniformity or agreement at a given moment. The former highlights variability; the latter, irregularity.