How to use "a unprecedented"

What Does "a unprecedented" Mean?

• Meaning of the collocation or phrasal verb: "Unprecedented" describes something that has never happened, been done, or been known before. It signifies a unique or novel occurrence.
• Whether meaning is compositional or semi-idiomatic: The meaning is compositional. The adjective "unprecedented" directly modifies a noun to indicate its novelty.
• Register: neutral

How to Use It

• Grammatical pattern: adjective + noun. "Unprecedented" functions as an adjective modifying a noun.
• Typical objects, complements, or prepositions that follow: It's typically followed by a noun describing the event, situation, or thing that is unique (e.g., an unprecedented event, an unprecedented scale).
• Can the components be separated? No, the adjective directly modifies the noun and should not be separated by other words except for adverbs modifying the adjective.
• What sounds unnatural: Using the article "a" before "unprecedented" is grammatically incorrect. It should be "an unprecedented" because the adjective begins with a vowel sound. Using "the" is only appropriate if referring to a specific unprecedented instance already known to both speaker and listener.

Real-World Examples

These examples are sourced from a unprecedented on Ludwig.guru.

"On Friday, his government collapsed after opposition parties voted it in contempt of Parliament, a unprecedented event in Canada." — The New York Times

"Trump has come a long way despite erratic and unpleasant behaviour on a unprecedented scale in modern politics." — The Guardian

"Citigroup was among nine big banks that received more than $125 billion from the government on Monday as part of a unprecedented bailout of the financial industry." — The New York Times

"Earth's glaciers are now melting at a unprecedented rate as a result of global warming – and that poses a serious scientific problem." — The Guardian

"Royal College of Nursing members angry with their union's handling of changes to the NHS pay deal have voted to pass a motion of no confidence in the organisation in a unprecedented move amid accusations it had misrepresented expected pay increases." — The Guardian

Examples sourced from https://ludwig.guru/s/a+unprecedented

Similar Phrases and Alternatives

Phrase	Context
unparalleled	Similar meaning, slightly more formal.
unmatched	Implies superiority in addition to uniqueness.
novel	Emphasizes newness and originality.
groundbreaking	Suggests a significant advancement or innovation.
exceptional	Indicates something is unusually good or outstanding; can imply rarity.
extraordinary	Similar to exceptional, but emphasizes deviation from the norm.
unheard of	More informal, emphasizes surprise or disbelief.

Common Mistakes

• Using "a" instead of "an" before "unprecedented" is a common error. The correct article is "an" because "unprecedented" begins with a vowel sound.
• Using "the unprecedented" when referring to something for the first time is incorrect unless the unprecedented nature is already established in the context.
• Learners often misuse articles (a/an/the) before adjectives modifying nouns, especially with less common adjectives like 'unprecedented'. Remember to use "an" before words that start with a vowel sound and "a" before words that start with a consonant sound.

Quick-Reference Summary

Expression	Meaning	Grammatical Pattern	Register
an unprecedented	Never done or known before.	Adjective + Noun	Neutral

FAQs

Can the parts of "an unprecedented" be separated?

No, the adjective "unprecedented" directly modifies the noun and the article "an" is linked to the adjective. You generally cannot insert words between "an," "unprecedented," and the noun it modifies, except for adverbs that describe the adjective itself (e.g., "an absolutely unprecedented event").

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How is "an unprecedented" different from "a similar"?

"An unprecedented" describes something unique and without prior example. "A similar" introduces something comparable but not identical to something else; it emphasizes resemblance rather than novelty. The key difference lies in the concept of uniqueness versus similarity.

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Why is "a unprecedented" incorrect, and how can I remember the correct usage?

"A unprecedented" is incorrect because the word "unprecedented" begins with a vowel sound. The rule is to use "an" before words beginning with a vowel sound, so the correct phrase is "an unprecedented." To remember, think of other words starting with a vowel sound like "an apple" or "an hour."