Definition of intensive adjective from the Oxford Advanced American Dictionary

      

    intensive

     adjective
    adjective
    NAmE//ɪnˈtɛnsɪv//
     
     
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  1. 1involving a lot of work or activity done in a short time an intensive language course two weeks of intensive training intensive diplomatic negotiations
  2. 2extremely thorough; done with a lot of care His disappearance has been the subject of intensive investigation.
  3. 3(of methods of farming) aimed at producing as much food as possible using as little land or as little money as possible Traditionally reared animals grow more slowly than those reared under intensive farming conditions. intensive agriculture see also capital-intensive, labor-intensive
 
adverb This case has been intensively studied. intensively farmed land
See the Oxford Advanced Learner's Dictionary entry: intensive