Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
not illegal
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "not illegal" is correct and usable in written English. You can use it to indicate that something is permissible or allowed under the law, even if it may be considered unethical or questionable. For example, "While the practice is controversial, it is not illegal." Alternative expressions include "legal," "permissible," and "allowed."
✓ Grammatically correct
News & Media
Formal & Business
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
Sexting is not illegal.
News & Media
"It's not illegal.
News & Media
"It's not illegal?" Black said.
News & Media
And it is not illegal.
News & Media
"They're not illegal," he said.
News & Media
Booze is not illegal.
News & Media
"Prostitution is not illegal".
News & Media
Not illegal, but unethical.
News & Media
"But that's not illegal".
News & Media
This was not illegal.
News & Media
I'm not illegal.
News & Media
Expert writing Tips
Best practice
Use "not illegal" to clearly state that an action, while possibly unethical or controversial, does not violate any laws. This provides a precise legal perspective, which can be crucial in discussions about ethics and legality.
Common error
Avoid using "not illegal" as a blanket justification for actions that are ethically questionable. While something might be within legal bounds, it may still be morally wrong. Acknowledge the ethical implications separately to maintain credibility.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "not illegal" functions primarily as a negative descriptor, indicating that a particular action or state does not contravene existing laws. As seen in Ludwig's examples, this phrase is frequently used in contexts where the ethical or moral implications are being debated, but the legal standing is clear.
Frequent in
News & Media
79%
Formal & Business
9%
Academia
1%
Less common in
Science
5%
Reference
3%
Wiki
3%
Ludwig's WRAP-UP
The phrase "not illegal" is a common and grammatically sound way to express that something does not violate the law. As Ludwig highlights, it frequently appears in news and media when discussing topics that may be ethically questionable but legally permissible. Understanding the proper use of "not illegal" helps to ensure clear communication, particularly when navigating complex legal and ethical discussions. While alternatives like "within the law" or "legally permissible" exist, "not illegal" offers a specific emphasis on the absence of legal prohibition, which Ludwig AI confirms.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
within the law
Emphasizes adherence to legal boundaries.
legally permissible
Highlights the legal allowance of an action.
not prohibited by law
Focuses on the absence of legal restrictions.
allowed by law
Directly states that something is permitted legally.
lawful
A concise term for being in accordance with the law.
legitimate
Indicates something is recognized and acceptable according to laws and rules.
permissible
Highlights the allowance of an action, often implying it's not just legal but also acceptable.
above board
Suggests honesty and legality, implying openness and transparency.
within regulations
Highlights compliance with specific rules and regulations.
in accordance with the law
Stresses the alignment of an action with existing legal standards.
FAQs
How can I use "not illegal" in a sentence?
Use "not illegal" to specify that an action or behavior doesn't violate any laws, even if it may be ethically questionable. For example, "While controversial, the practice is "not illegal"."
What are some alternatives to saying "not illegal"?
You can use phrases like "within the law", "legally permissible", or "lawful" to convey that something is permissible under the law.
Is there a difference between "not illegal" and "ethical"?
"Not illegal" means that an action does not violate any laws, while "ethical" refers to whether the action conforms to moral principles. Something can be "not illegal" but still unethical, and vice versa.
When should I use "not illegal" instead of "legal"?
Use "not illegal" when you want to emphasize that something is merely within the boundaries of the law, potentially implying that it might still be questionable in other aspects, such as ethics or morality. "Legal" is a more general term, whereas "not illegal" is more specific in that it explicitly denies illegality.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested