1. In a widespread way
   "oxidation ponds are extensively used for sewage treatment in the Midwest"

See also: extensive

• rentier
• renting
• renumber
• renunciant
• renunciation
• renunciative
• renvoi
• reoccupy
• reoccur
• reoccurence
• reopen
• reorder
• reordering
• reorganisation
• reorganise
• reorganised
• reorganization
• reorganize
• reorganized
• reorient
• reorientate
• reorientation
• Reoviridae
• reovirus
• rep