Cool MateCertain vs Definite vs Positive vs Sure
When to use each in English, with meaning, register, and examples.
Certain
Top 1,000 (very common)A2adjective
Definite
Top 2,000 (common)B1adjective
Positive
Top 1,000 (very common)A1adjective
Sure
Top 1,000 (very common)A1adjective
| Certain | Definite | Positive | Sure | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈsɜːtn/"]/🇺🇸 /["/ˈsɜːrtn/"]/ | 🇬🇧 /["/ˈdefɪnət/"]/🇺🇸 /["/ˈdefɪnət/"]/ | 🇬🇧 /["/ˈpɒzətɪv/"]/🇺🇸 /["/ˈpɑːzətɪv/"]/ | 🇬🇧 /["/ʃʊə(r)//ʃɔː(r)/"]/🇺🇸 /["/ʃʊr/"]/ |
| Meaning | sure, without any doubt | Clear and certain. | Having a good attitude or a good feeling about something. | certain or confident about something |
| Example | I am certain that I locked the door before leaving. | She gave a definite answer to the question. | She has a positive attitude that inspires everyone around her. | I am sure that we will win the game. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 2,000 (common) | Top 1,000 (very common) | Top 1,000 (very common) |
| CEFR level | A2 | B1 | A1 | A1 |
| Part of speech | adjective | adjective | adjective | adjective |
| Collocations | be, feel, look, very, absolutely, quite, about, of, can’t say for certain, not know for certain, be, feel, look, very, absolutely, quite, about, of, can’t say for certain, not know for certain | definite answer, definite plan, definite statement, definite proof | appear, be, feel, extremely, fairly, very, about, be, prove, test, strongly, weakly, for, be, seem, sound, absolutely, quite, fairly, about, of | be, feel, seem, absolutely, completely, quite, about, of, be, feel, seem, absolutely, completely, quite, about, of |
| Antonyms | uncertain, doubtful, indefinite | vague, uncertain, ambiguous | negative, pessimistic | uncertain, doubtful, unsure |
| Common mistakes | Confused with 'sure' in different contexts., Using 'certain' without clarifying what is certain about., Incorrectly using 'certain' to describe someone as a person (should be used for objects or ideas). | Confusing 'definite' with 'definitive' which has a different meaning., Using 'definite' with uncountable nouns incorrectly, such as 'a definite knowledge'., Omitting the noun after 'definite' in phrases like 'this is definite'. | Confused with 'positive' vs 'negative'., Using 'positively' in place of 'positive' incorrectly., Mispronouncing 'positive' without the correct emphasis. | Used too casually in formal situations., Confused with 'surely' which implies a stronger confirmation., Mispronounced as 'sher' instead of 'shur'. |
| Usage notes | Use 'certain' when you want to express confidence in something. It's appropriate in both spoken and written English, but avoid it in very formal contexts where 'specific' or 'determined' may be better. | Use 'definite' when you want to express something that is clearly stated or decided. It is appropriate in both spoken and written contexts but may sound overly formal in casual conversations. | Use 'positive' to describe feelings, thoughts, or results. It's appropriate in most contexts, but avoid in very technical discussions where precision is key. | Used to express agreement or assurance. It's typically appropriate in most casual and formal contexts, but can feel dismissive if overused in a conversation. |
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Frequently asked questions: Certain vs Definite vs Positive vs Sure
What's the difference between Certain, Definite, Positive, and Sure?
Certain: sure, without any doubt Definite: Clear and certain. Positive: Having a good attitude or a good feeling about something. Sure: certain or confident about something
Are Certain, Definite, Positive, and Sure the same CEFR level?
Certain: A2, Definite: B1, Positive: A1, Sure: A1 on the CEFR scale.
Can I use Certain, Definite, Positive, and Sure interchangeably?
Not always. Certain, Definite, Positive, and Sure are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.