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
is mostly filled
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is mostly filled" is correct and usable in written English.
It can be used to describe a situation where something is predominantly occupied or contains a significant amount of content or material. Example: "The jar is mostly filled with marbles, leaving just a little space at the top."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Wiki
Alternative expressions(3)
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
33 human-written examples
The present-day Casey basin is mostly filled.
Science
The ensemble is mostly filled out by actors who are as talented as they are miscast.
News & Media
It is mostly filled with technology buzzwords and a thumping soundtrack, but it offers a colorful glimpse into the future.
News & Media
Asserting that the universe is mostly filled with dark undetected matter and energy, he said, is "an incredible statement".
News & Media
Its main thoroughfare, the eight-block Monmouth Street, is mostly filled with marginal businesses and eating places.
News & Media
He gestured toward St. Marks Place, which in this millennium is mostly filled with Japanese dumpling and yogurt shops, and the odd tattoo parlor.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
27 human-written examples
Unfortunately, the rest of "Laughing Matters" is mostly filling.
News & Media
These days, her mainland Chinese friends and colleagues are mostly filled with admiration.
News & Media
"But we moved the first ones back Aug. 15, and it's mostly filled now.
News & Media
But local caddyshacks are mostly filled with black men, many past middle age.
News & Media
But the once-empty buildings are mostly filled with galleries now.
News & Media
Expert writing Tips
Best practice
When using the phrase "is mostly filled", ensure that the context provides a clear understanding of what the subject is filled with. This adds clarity and avoids ambiguity.
Common error
While "is mostly filled" is generally acceptable, avoid overuse in formal or academic writing. Consider stronger, more precise alternatives like "is largely occupied" or "is predominantly full" to enhance the writing's impact and sophistication.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is mostly filled" functions as a descriptive phrase, indicating the degree to which something is occupied or full. Ludwig provides various examples demonstrating its use in diverse contexts, affirming its validity.
Frequent in
News & Media
44%
Science
28%
Wiki
12%
Less common in
Encyclopedias
8%
Formal & Business
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "is mostly filled" is a common and grammatically correct way to describe something that is largely occupied but not entirely full. As Ludwig AI confirms, its use is widespread across various contexts, particularly in news, science, and general writing. While perfectly acceptable, consider using more formal synonyms like "is largely occupied" in academic or professional settings to enhance precision and sophistication. Remember to clearly define what is filling the subject to avoid ambiguity. It is crucial to use "filled" and not "fill" after mostly to maintain correct grammar. Consider that there are multiple options such as "is largely occupied", "is predominantly full", or "is almost entirely full" depending on the context and the nuance you wish to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
is largely occupied
Replaces "filled" with "occupied", focusing on the space being taken rather than the content.
is predominantly full
Substitutes "mostly filled" with "predominantly full", emphasizing the extent of being full.
is almost entirely full
Emphasizes the nearness to being completely full, adding a degree of approximation.
is substantially packed
Uses "packed" instead of "filled", highlighting the density of the contents.
is mainly comprised of
Shifts the focus to the composition of the contents, rather than the state of being filled.
is heavily laden with
Implies a significant weight or burden due to the contents.
is nearly brimming with
Suggests that the contents are close to overflowing.
is close to capacity
Focuses on the relationship to the maximum possible fill level.
is crammed with
Highlights a state of being tightly packed and potentially overcrowded.
is abundant in
Replaces "filled" with "abundant", focusing on the ample presence of something.
FAQs
How can I use "is mostly filled" in a sentence?
Use "is mostly filled" to describe something that has a significant amount of content but isn't completely full. For example, "The glass "is mostly filled" with water."
What are some alternatives to "is mostly filled"?
Alternatives include "is largely occupied", "is predominantly full", or "is almost entirely full" depending on the context and the nuance you wish to convey.
Is it correct to say "is mostly fill" instead of "is mostly filled"?
No, "is mostly fill" is grammatically incorrect. The correct form is "is mostly filled", where "filled" is the past participle of the verb "to fill".
What is the difference between "is mostly filled" and "is completely filled"?
"Is mostly filled" indicates that something is largely, but not entirely, full. In contrast, "is completely filled" means that something is 100% full, leaving no empty space.
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