General opposites:
* Indefinite: This is the most direct opposite, meaning unclear, uncertain, or vague.
* Uncertain: This emphasizes doubt or lack of confidence in something.
* Ambiguous: This suggests that something can be interpreted in multiple ways.
* Vague: This means unclear or imprecise.
* Unclear: This is a general term for something that is not easily understood.
Opposites in specific contexts:
* Possible: If "definite" means "certain," then "possible" is the opposite.
* Flexible: If "definite" means "fixed," then "flexible" is the opposite.
* Tentative: If "definite" means "firm," then "tentative" is the opposite.
The best opposite word to use will depend on the specific meaning of "definite" in the sentence.