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Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

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ill defined border

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "ill defined border" is not correct in standard written English; it should be "ill-defined border." You can use it when discussing boundaries that are vague or not clearly established, often in contexts like geography or policy.
Example: "The region has an ill-defined border, leading to disputes between neighboring countries."

⚠ May contain grammatical issues

Human-verified similar examples from authoritative sources

Similar Expressions

59 human-written examples

Three patients with lymph nodes showing metastatic ovarian carcinoma (diagnosed as metastatic adenocarcinoma) showed groups and sheets of atypical cells having high nucleus to cytoplasm ratio, overlapping and pleomorphic vesicular to hyperchromatic nuclei with inconspicuous to rarely conspicuous nucleoli, ill defined cytoplasmic borders and cytoplasmic vacuolations.

A sharply defined border can be a cruel thing.

News & Media

Independent

Compared with the diffuse, ill-defined border of the VM-M3 tumour observed in the AL-fed control mice, the tumour grown in the CR mice appeared denser with a more defined border.

Science

ASN Neuro

US detected abnormal imaging as solid lesions with ill defined or irregular borders, non calcified lesions with posterior acoustic shadowing, solid intracistic or intraductal lesions.

Science

BMC Cancer

The Palestinians want a final agreement for the establishment of a state with defined borders.

News & Media

The New York Times

Rarely, poorly defined borders are observed.

That is, the game isn't entirely an FPS with clearly defined borders.

News & Media

TechCrunch

Nuclei had well defined borders.

These tumours have discrete, sharply defined borders.

These NEAT1 RNA foci show sharply defined borders and little nucleoplasmic signal.

The borders of the lesions may be ill defined or clearly defined (Fig.  3a).

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Expert writing Tips

Best practice

Always hyphenate "ill-defined" when used as a compound adjective before a noun, such as in "ill-defined border". This ensures grammatical correctness and clarity.

Common error

The most common mistake is omitting the hyphen in "ill-defined". Without the hyphen, "ill" can be misinterpreted as modifying "defined" rather than the entire phrase modifying "border".

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

60%

Authority and reliability

2.5/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "ill defined border" (or, correctly, "ill-defined border") functions as an adjective phrase modifying the noun "border". Ludwig AI suggests that it is grammatically incorrect without the hyphen.

Expression frequency: Missing

Frequent in

Science

0%

News & Media

0%

Formal & Business

0%

Less common in

Science

0%

News & Media

0%

Formal & Business

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Ludwig's WRAP-UP

The phrase "ill defined border" requires a hyphen to be grammatically correct: "ill-defined border". This phrase describes a boundary that lacks clarity or precision. Ludwig AI identifies the unhyphenated version as incorrect. While the phrase itself has no specific usage context, it would be considered to have a neutral register. Without the hyphen, the phrase is grammatically flawed and open to misinterpretation.

FAQs

How should I correctly write "ill defined border"?

The grammatically correct way to write it is "ill-defined border", using a hyphen to connect "ill" and "defined" when they act as a single adjective modifying "border".

What does "ill-defined border" mean?

It refers to a boundary or frontier that is not clearly established or easily recognized. It can be used in geographical, political, or even conceptual contexts.

Are there synonyms for "ill-defined border"?

Yes, you can use alternatives such as "vague demarcation", "poorly defined boundary", or "indistinct boundary".

Can you provide an example of how to use "ill-defined border" in a sentence?

A correct example would be: "The region has an ill-defined border, leading to frequent disputes between neighboring countries."

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Real-world application tested

Most frequent sentences: