# definitive

/dɪˈfɪnɪtɪv/ (US) · /dɪfˈɪnɪtˌɪv/ (UK)

Source: https://englishreference.com/word/definitive
Updated: 2026-06-20

## Senses

### 1. authoritative and complete

adjective · CEFR B2

the best and most complete version of something that everyone trusts.

For teachers: providing a firm conclusion or being the most authoritative of its kind.

- This is the definitive book on the history of jazz.
- Scholars consider this biography to be the definitive account of the poet's life, as it incorporates previously undiscovered letters and journals.

Usage: often used to describe books, biographies, or studies.

Teaching tip: Learners often confuse this with 'definite'. While 'definite' means certain, 'definitive' means it is the final, highest-quality version.

### 2. final and decisive

adjective · CEFR B2

a final decision or answer that ends all doubt or talking.

For teachers: conclusive and final; bringing an end to a process or debate.

- The court gave a definitive ruling on the case yesterday.
- The laboratory results provided definitive proof that the water supply had been contaminated by industrial runoff.

### 3. standard postage stamp

noun · CEFR C2 · Technical

a regular stamp used for everyday mail, not a special one for a holiday.

For teachers: a postage stamp issued as part of a regular series for indefinite use, rather than a commemorative issue.

- He added a common definitive to his stamp collection.
- While commemorative stamps attract casual collectors, serious philatelists often focus on the subtle plate variations found in long-running definitives.

Usage: usually used by collectors or postal workers.

### 4. limiting word

noun · CEFR C2 · Technical · Academic

a word like 'the' or 'this' that points to a specific thing.

For teachers: a word, such as a definite article or demonstrative, that serves to define or limit the reference of a noun.

- The teacher explained how a definitive helps identify a specific noun.
- The linguist argued that the definitive functions as a functional head within the noun phrase structure.

Usage: used in formal linguistic analysis.

Teaching tip: In modern grammar, these are more commonly referred to as 'determiners'.

## Examples

- This is the definitive guide to local birds.
- The court's ruling provided a definitive answer to a legal question that had been debated for decades.
- After years of conflicting reports, the professor published what is now considered the definitive biography of the explorer, utilizing previously undiscovered private journals to settle several historical disputes.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.