Definition of "leveling"

leveling

verb
1. (US) present participle and gerund of level
noun
countable and uncountable, plural levelings
1. The process of making something level.
  Quotations
  In the meantime, the Castilian of northern and central Spain, while retaining most of the traits of the pre-Columbian period, underwent changes and levelings, some of which were shared by the South and hence by America.
  1981, D. Lincoln Canfield, Spanish Pronunciation in the Americas
2. (surveying, archaeology) The process of measuring levels to establish heights and altitudes.
3. (linguistics) Ellipsis of paradigm leveling, the replacement of irregular forms by regular forms.