Section 2(1)(i) in THE NATIONAL CAPITAL TERRITORY OF DELHI LAWS (SPECIAL PROVISIONS) ACT, 2011
(i)“unauthorised development” means use of land or use of building or construction of building or development of colonies carried out in contravention of the sanctioned plans or without obtaining the sanction of plans, or in contravention of the land use as permitted under the Master Plan or Zonal Plan or layout plan, as the case may be, and includes any encroachment.