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
cohabitation
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "cohabitation" is correct and usable in written English.
It can be used to refer to the act of living together and sharing a domestic life, typically in a romantic relationship without being married. Example: "Their cohabitation has raised questions about their long-term commitment to each other."
✓ Grammatically correct
News & Media
Alternative expressions(1)
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
Good news, same sex couples: adopting is out, but cohabitation is in.
News & Media
It is as if, after unquestioning decades of cohabitation, one partner woke up one morning with a jolt and blurted out: "I don't have much in common with you any more, if I ever did.
News & Media
Now, in the face of a third "cohabitation", a Gaullist president makes no such claims to exclusive control of a policy area long viewed as the president's domaine réservé.
News & Media
And if they do not, then too bad for the left: after all, it has complained often enough that cohabitation does French democracy and French government no favours.But there is a second reason why the thoughtful may temper their praise for the May Day demonstrators with a smidgen of doubt.
News & Media
So they can still choose a fourth cohabitation.
News & Media
Having served Mitterrand throughout the 14 years of his presidency, first as foreign-affairs adviser and then as chief of staff, he has invaluable general experience of dealing with the outside world and, in particular, of doing so during periods of cohabitation (once with Mr Chirac as prime minister).
News & Media
Now Georgia will have to live with a strong opposition in parliament and a year of cohabitation between a president and prime minister who agree on little if anything.
News & Media
That would avenge the right's defeat of 1997 and so let its president avoid a repetition of the five-year "cohabitation" he has just endured with the left.The challenge for Mr Chirac is to maintain that momentum.
News & Media
Since then Mr Ramos-Horta has been prime minister, in an uneasy cohabitation with Fretilin.The outgoing president, Xanana Gusmão, once led the resistance's armed wing but fell out with Fretilin years ago.
News & Media
He was particularly concerned by the law's focus on purportedly "religious cohabitation".
News & Media
And attitudes to cohabitation have shifted: almost a quarter of young adults now live with a partner.
News & Media
Expert writing Tips
Best practice
When discussing "cohabitation", consider the specific context to determine if a more formal or informal term is appropriate. For example, "domestic partnership" might be preferable in a legal context, while "living together" is suitable for casual conversation.
Common error
The term "cohabitation" typically refers to romantic partnerships, but it can also describe other living arrangements. Always clarify the relationship to avoid misinterpretations. For example, use "shared housing" to denote non-romantic co-residency.
Source & Trust
93%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "cohabitation" is as a noun. It refers to the act of living together, typically in an intimate relationship without legal or religious sanction. As Ludwig AI indicates, the word is commonly used and grammatically correct.
Frequent in
News & Media
100%
Less common in
Science
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, "cohabitation" is a grammatically sound and frequently used noun to describe the act of living together, often in a romantic context without being married. Ludwig AI confirms its correctness and usability in various writing styles. While broadly neutral, its formality can shift based on context. As Ludwig's analysis reveals, it appears predominately in news and media. For alternative expressions, one may consider "living together" or "domestic partnership" depending on the desired nuance.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Living together
Replaces the formal term with a more common and straightforward expression.
Domestic partnership
Highlights the shared living arrangement and potential legal implications.
Unmarried partnership
Emphasizes the absence of a formal marriage.
Sharing a residence
Focuses on the physical aspect of living in the same place.
Common-law relationship
Implies a recognized, though not legally formalized, union.
Joint residency
A more formal way to describe sharing the same living space.
Civil partnership
Highlights the legal registration of the union, differing from informal cohabitation.
Living in sin
An older, often judgmental term for unmarried cohabitation.
Shacking up
An informal and sometimes pejorative term for cohabitation.
Roommates with benefits
Informal expression indicating a shared living space with a romantic element.
FAQs
What does "cohabitation" mean?
"Cohabitation" refers to the state of living together, often used to describe unmarried couples who share a residence and a life together.
What are some alternatives to the word "cohabitation"?
Depending on the context, you can use alternatives like "living together", "domestic partnership", or "unmarried partnership".
Is "cohabitation" a formal or informal term?
"Cohabitation" is generally considered a neutral term. However, the level of formality depends on the context. For example, "common-law relationship" might be used in legal contexts, while "living together" is more casual.
What is the difference between "cohabitation" and marriage?
"Cohabitation" describes a living arrangement where two people reside together, often in a romantic relationship, without being legally married. Marriage is a legally recognized union that provides certain rights and responsibilities.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
93%
Authority and reliability
4.6/5
Expert rating
Real-world application tested