Big means large in size, extent, or amount; important or significant in impact; or done on a large scale. As an informal adverb it means ambitiously or impressively, as in think big.
What Does Big Mean?
Big is one of the most common adjectives in the English language, recorded in use from around the 14th century. Its exact origin is uncertain, but it is likely borrowed from a Scandinavian source — compare Norwegian dialect bugge meaning a powerful or important man. The earliest recorded sense was "strong" or "powerful" rather than simply "large", which explains why big still carries a sense of significance and importance beyond mere physical size.
In modern British English, big covers three overlapping senses. First, it describes physical size: a big dog, a big room. Second, it expresses importance or seriousness: a big decision, a big problem. Third, it describes scale or ambition: big plans, think big. Unlike large, which is more formal and neutral, big is flexible enough for everyday speech, headlines, and informal writing across all levels of English.
Understanding the difference between big, large, and great is essential for natural-sounding English. Big is informal and emotionally weighted; large is factual and formal; great adds a sense of exceptional quality or degree. Compare: a big dinner (informal, possibly exciting), a large meal (neutral, describing quantity), a great feast (formal or literary, implying splendour).
Example Sentences
| Sentence | Level / Usage note |
|---|---|
| There is a big dog in the garden. | A2 — describing physical size |
| She passed her driving test — that is a big achievement for her. | B1 — expressing importance |
| Learning a new language is a big achievement at any age. | B1 — core example sentence |
| The company made a big investment in renewable energy last year. | B2 — business / formal informal register |
| If you want to make a genuine difference in your field, you have to be willing to think big and accept the risk that comes with it. | C1 — adverb use; complex sentence structure |
Collocations with Big
| Collocation | Example |
|---|---|
| big deal | Missing one class is not a big deal. |
| big picture | Try to focus on the big picture rather than minor details. |
| big decision | Choosing a career is one of the biggest decisions you will make. |
| big mistake | Ignoring the feedback was a big mistake. |
| big difference | Regular practice makes a big difference to your fluency. |
| big opportunity | This project is a big opportunity for the whole team. |
| big question | The big question is whether the funding will be approved. |
| big fan | She is a big fan of jazz music. |
| big success | The event was a big success by any measure. |
| think big | Start small, but always think big. |
Usage Notes
How to Use Big Correctly
- As an attributive adjective (before a noun): a big house, a big change, a big smile.
- As a predicative adjective (after a linking verb): The problem is big, That news is big.
- As an informal adverb (after certain verbs): think big, dream big, talk big. In this use, big follows the verb and does not take -ly.
- Comparative and superlative: bigger, biggest. Double the final consonant before adding -er or -est.
- Register: Big is neutral to informal. In formal academic writing, prefer large (size) or significant / major (importance).
Common Mistakes
Watch Out For
She made a very big progress last term.
She made great progress last term. (Progress is uncountable — avoid using big with uncountable nouns in this pattern; use great or significant.)
He speaks English very bigly.
He speaks English very well. (Big does not form a standard adverb with -ly; use think big or rephrase entirely.)
It was a big amount of work.
It was a large amount of work. (For quantities and amounts, large is the natural collocate, not big.)