extensive

/ɪkˈstɛnsɪv/
adjective
  1. Covering a large area; having a wide range or scope.
    • The library has an extensive collection of rare books.
    • After the storm, there was extensive damage to the coastal towns.
    • She did extensive research before writing her report.
  2. Large in amount or degree.
    • We have extensive experience in this field.
    • He suffered extensive injuries in the accident.
    • The company made extensive changes to its hiring policy.
What does "extensive" mean? | whatsthatwordmean | whatsthatwordmean