ill-defined

USAGE SUMMARY

The word 'ill-defined' is a correct and usable word in written English.
You can use it to refer to things or concepts that are vague, unclear, or not well defined. For example: "The company's goals were ill-defined, making it difficult for employees to understand what was expected of them."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

51 human-written examples

"It's easiest to define somebody when they're ill-defined, and John Kerry's ill-defined".

The New York Times

It is an intentionally ill-defined term.

The New Yorker

"This process is open-ended and ill-defined".

The New York Times

("Theft" was another ill-defined term in the speech).

The New Yorker

They'd have some ill-defined "compensation" for missing work.

The New Yorker

Still, Mr. Coffey's role was ill-defined and spread thin.

The New York Times

Human-verified similar examples from authoritative sources

Similar Expressions

9 human-written examples

As a health threat, it was ill defined.

The New York Times - Science

And their long-term risks are ill defined.

The New York Times

It is ill defined at best, hypocritical at worst.

The New York Times - Sports

Once again, the figure is very crude and ill defined.

Independent

The instruments' place in museums too is ill defined.

The New York Times

Expert writing Tips

Best practice

When using "ill-defined", ensure the context makes clear what specifically lacks definition. Provide additional details or examples to clarify the subject's ambiguity.

Common error

Avoid using "ill-defined" as a catch-all term for anything unclear. Instead, pinpoint the specific aspects that lack clarity, such as scope, criteria, or boundaries.

Linguistic Context

The phrase "ill-defined" functions as an adjective, typically used to modify nouns by describing them as lacking clarity, precision, or distinct boundaries. Ludwig AI confirms that "ill-defined" is a correct and usable term in written English.

Expression frequency: Very common

Frequent in

News & Media

38%

Science

58%

Formal & Business

2%

Less common in

Wiki

2%

Academia

0%

Reference

0%

Ludwig's WRAP-UP

The term "ill-defined" is a frequently used adjective phrase that describes something lacking clarity or precision. As confirmed by Ludwig AI, it's a correct and usable expression in English. Its primary function is to express ambiguity and is found commonly in news and scientific contexts. When employing "ill-defined", ensure the context clarifies what aspects are unclear and consider alternatives like "vague" or "unclear" for different nuances. Avoid using it as an overgeneralization; instead, specify the exact source of ambiguity. This review synthesizes grammatical correctness, usage contexts, and expert analysis to guide effective communication.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

poorly defined

Focuses on the inadequacy of the definition itself.

vague

Emphasizes the lack of distinctness and clarity.

unclear

Highlights the difficulty in understanding or perceiving.

ambiguous

Suggests the possibility of multiple interpretations.

imprecise

Indicates a lack of exactness or accuracy.

nebulous

Implies a hazy or indistinct quality.

fuzzy

Suggests a lack of sharpness or clarity, often in a figurative sense.

indistinct

Highlights the lack of clear boundaries or features.

loosely defined

Emphasizes the lack of strictness or rigidity in the definition.

tenuous

Suggests a weak or insubstantial connection or definition.

FAQs

How can I use "ill-defined" in a sentence?

You can use "ill-defined" to describe something that lacks clarity or precision. For example, "The project's goals were "ill-defined", leading to confusion among the team members."

What are some alternatives to "ill-defined"?

Alternatives to "ill-defined" include "vague", "unclear", "ambiguous", and "poorly defined". The best choice depends on the specific nuance you want to convey.

Is it better to say "ill-defined" or "poorly defined"?

Both "ill-defined" and "poorly defined" are acceptable. "Ill-defined" may subtly emphasize the state of lacking definition, while "poorly defined" emphasizes the quality of the definition itself. The difference is minimal.

What does it mean when something is described as "ill-defined" in a scientific context?

In a scientific context, "ill-defined" suggests that a concept, process, or phenomenon lacks a precise or rigorous definition. This can hinder research and require further investigation to establish clearer parameters. For example, a syndrome might be "ill-defined" if its diagnostic criteria are not clearly established.