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
a big subject
Grammar usage guide and real-world examplesUSAGE SUMMARY
"a big subject" is correct and usable in written English.
You can use it when talking about a broad topic, or when referring to a general area of investigation. For example, you might say, "This is a big subject, so we'll need lots of time to discuss it."
✓ Grammatically correct
News & Media
Science
Formal & Business
Alternative expressions(20)
an important question
a big problem
a person of consequence
a mature individual
a generous person
a big person
a weighty issue
a big regulations
a fat person
a lovely person
a substantial issue
an important figure
a big body
a generous soul
a broad theme
a big theme
a person of stature
a towering figure
a complex issue
a fundamental subject
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
56 human-written examples
"It's a big subject.
News & Media
A big subject?
News & Media
Houellebecq's novel certainly attacks a big subject.
News & Media
"This is a big subject," he sighs.
News & Media
Hip-hop is a big subject.
News & Media
(The Britishness of contemporary British art is a big subject).
News & Media
Munch is a big subject for a small museum.
News & Media
"It's a big subject of conversation," one pilot said.
News & Media
No novel.' Houellebecq's novel certainly attacks a big subject.
News & Media
A few scattershot reflections on what is a big subject.
News & Media
It's a big subject, covering more ground that slavery at Monticello.
News & Media
Expert writing Tips
Best practice
Use "a big subject" to signal that you'll only be able to scratch the surface of the topic, implying further exploration may be needed.
Common error
Avoid using "a big subject" as an excuse for a lack of depth. While it signals the scope is large, it shouldn't excuse superficial treatment; still provide concrete examples and focused analysis.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a big subject" functions as a noun phrase, typically serving as a subject complement or object in a sentence. It describes the topic or issue under discussion, indicating that it is broad and encompassing. As Ludwig AI confirms, it is grammatically correct and widely used.
Frequent in
News & Media
61%
Science
18%
Formal & Business
10%
Less common in
Encyclopedias
3%
Wiki
3%
Reference
5%
Ludwig's WRAP-UP
In summary, "a big subject" is a common and versatile phrase used to describe topics of considerable breadth and scope. Ludwig AI confirms its grammatical correctness and usability across various contexts. As evidenced by Ludwig's examples, it frequently appears in News & Media, Science, and Formal & Business writing. When using this phrase, it's important to provide context and manage audience expectations, acknowledging the complexity of the subject while avoiding overgeneralization. Related alternatives include phrases like "a major topic" or "a broad theme", each offering slightly different nuances to emphasize the scale, importance, or complexity of the issue at hand.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
a major topic
Emphasizes the importance and scope of the subject.
a broad theme
Highlights the wide-ranging nature of the subject matter.
a complex issue
Focuses on the intricate and multifaceted nature of the subject.
an extensive area
Indicates the vastness and comprehensiveness of the subject.
a significant matter
Stresses the importance and relevance of the subject.
an important question
Highlights the critical nature of the subject being discussed.
a key area of concern
Focuses on the critical and potentially problematic aspects of the subject.
a weighty issue
Suggests the subject is serious and demands careful consideration.
a substantial issue
Indicates the subject has considerable size and significance.
a far-reaching theme
Emphasizes the wide impact and influence of the subject.
FAQs
How can I use "a big subject" in a sentence?
You can use "a big subject" to introduce a topic that is broad, complex, or has many facets. For example, "Climate change is "a big subject" that requires a multidisciplinary approach."
What's a more formal way to say "a big subject"?
In more formal contexts, consider using phrases like "a major topic" or "a significant matter" to convey the importance and scope of the subject.
How can I indicate that a subject is too broad to cover fully?
Use "a big subject" to set expectations about the depth of coverage. For instance, "Artificial intelligence is "a big subject"; we'll only be able to touch on the key concepts today."
What's the difference between "a big subject" and "a complex issue"?
"A big subject" refers to the breadth and scope of a topic, while "a complex issue" highlights the intricate and multifaceted nature of a problem or challenge.
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
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested