Meaning: Focused and concentrated
* The company is undergoing an intensive marketing campaign to launch their new product.
* She followed an intensive training program to become a certified yoga instructor.
* The doctor recommended intensive physical therapy to help her recover from the injury.
Meaning: Characterized by high intensity
* The intensive heat of the desert made it difficult to travel.
* They experienced intensive fighting during the war.
* The scientist used intensive lasers to analyze the sample.
Meaning: Very thorough or detailed
* The students had an intensive review session before the exam.
* The author conducted intensive research for her historical novel.
* They performed an intensive search for the missing child.
Meaning: Relating to a process or system that is carried out on a large scale
* The country has a vast intensive farming industry.
* The city is experiencing intensive urban development.
* They implemented an intensive recycling program to reduce waste.
You can also use "intensive" to describe something that is *focused on a specific area or subject*:
* She took an intensive French language course.
* He is an expert in intensive care medicine.
* The school offers an intensive program for gifted students.
The meaning of "intensive" will depend on the context of the sentence.