Here are some examples:
* "Obesity is a prevalent problem in many developed countries." This means obesity is common in those countries.
* "The use of social media is prevalent among teenagers." This means teenagers frequently use social media.
* "The belief that the Earth is flat is still prevalent in some circles." This means the belief is still common in some groups.
Synonyms for prevalent:
* Common
* Widespread
* General
* Popular
* Dominant
* Predominant
* Rampant
Antonyms for prevalent:
* Rare
* Uncommon
* Infrequent
* Scarce