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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
outlined in red
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "outlined in red" is correct and usable in written English.
It can be used to describe something that has been marked or highlighted in red, often for emphasis or clarity. Example: "The key points of the presentation are outlined in red for easy reference."
✓ Grammatically correct
News & Media
Science
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
50 human-written examples
Another slide showed southeastern Louisiana, with areas of land loss expected by 2050 outlined in red.
News & Media
Places where the thermal sensor detected active fires are outlined in red.
News & Media
Areas under Nazi occupation were outlined in red, with blue arrows to indicate invading enemy troops.
News & Media
Wildfires burning in Alberta, north of the Athabasa oil sands, are outlined in red, while forests appear dark green.
News & Media
Stretched across the top of the Whitney's facade you'll see an optimistic incitement to look, only look, given a new exultant vantage point: "As Far as the Eye Can See," the show's title, in huge yellow letters outlined in red.
News & Media
Glass bricks in the shape of a 55-foot-long hook and ladder truck, outlined in red and buff concrete blocks, allow a glimpse inside at a real fire truck.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
8 human-written examples
The rectangular shape outlined in deep red that dominates the painting, a copy of "Red on Maroon," will probably seem unfamiliar to those who have seen Rothkos in American museums.
News & Media
Lower panels are magnified images of subsurface cisterns outlined in the red box in the upper panel.
Science
The hyperlink outlined in the red box takes the user to the ProteinProphetProbability Cutoff vs. False Positive Error Rate Table shown in (B ).
The 3D density has been projected down into two dimensions in the anterior (XY) and dorsal (XZ) planes, with the LH border outlined in green or red, respectively.
Science
The floors are all pale earthenware tiles, the off-white interiors outlined in pinks, blues, reds, yellows and greens.
News & Media
Expert writing Tips
Best practice
Use "outlined in red" when you need to clearly indicate the boundaries or shape of something, especially in visual contexts like maps, diagrams, or images.
Common error
Avoid using "outlined in red" when you actually mean something is entirely colored red. "Colored red" or "painted red" would be more appropriate in those cases.
Source & Trust
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "outlined in red" functions as a descriptive modifier, specifically a participial phrase acting as an adjective. It describes a noun by indicating that it has a red outline. Ludwig examples showcase its role in visually defining areas or objects.
Frequent in
Science
50%
News & Media
45%
Wiki
5%
Less common in
Formal & Business
0%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, the phrase "outlined in red" is a common and grammatically sound way to describe something visually highlighted with a red border. As Ludwig confirms, it's frequently used in both scientific and news contexts to draw attention to specific areas or objects in diagrams, maps, or images. While "outlined in red" is acceptable for describing perimeters, remember to use alternatives like "colored red" if the intention is to convey that the entire area is red. Remember that you can use alternative phrases like "highlighted in red" depending on the specific meaning you want to convey.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
delineated in red
Uses a more formal verb, 'delineated', suggesting a precise outlining.
highlighted in red
Focuses on emphasizing something with red, rather than just outlining it.
marked in red
A more general term for indicating something with red color.
colored in red
Implies filling an area with red color, not just the outline.
edged in red
Suggests a border or edge being colored red.
bordered in red
Similar to 'edged', but can also imply a more substantial border.
drawn in red
Implies a visual representation created with red lines.
rendered in red
More formal, suggesting a complete visual depiction using red.
indicated in red
Focuses on pointing something out using the color red.
specified in red
Implies giving detailed information with the use of red color.
FAQs
How can I use "outlined in red" in a sentence?
You can use "outlined in red" to describe how something is visually marked or highlighted. For example, "The areas of potential land loss were "outlined in red" on the map."
What is a synonym for "outlined in red"?
A synonym for "outlined in red" is "highlighted in red", which also indicates emphasis or marking with the color red.
When should I use "outlined in red" versus "highlighted in red"?
"Outlined in red" is best when you are specifically referring to the border or edges of something. "Highlighted in red" can be used more generally to indicate emphasis of any area.
What does it mean when something is "outlined in red"?
When something is "outlined in red", it means that its perimeter or boundary is marked with a red line, often to draw attention to it or define its shape.
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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
86%
Authority and reliability
4.5/5
Expert rating
Real-world application tested