Definition of "reconstruction"

reconstruction

noun
countable and uncountable, plural reconstructions
1. A thing that has been reconstructed or restored to an earlier state.
  Quotations
  Sunderland station has undergone several reconstructions.
  2021 August 11, “Network News: £26m Sunderland station rebuild”, in RAIL, number 937, page 24
2. The act of restoring something to an earlier state.
  Quotations
  By a remarkable piece of railway reconstruction work on the part of the Allied Forces—mainly South African railway construction troops—mines laid along the track by the retreating enemy were removed by sappers, and the German damage made good, within 7 days.
  1944 March and April, “The Western Desert Railway”, in Railway Magazine, page 73
  A striking example comes to mind, in which a scheme to improve the existing buildings finished up as virtually a complete reconstruction, owing to the unsound condition of the original structure!
  1962 October, Brian Haresnape, “Focus on B.R. passenger stations”, in Modern Railways, page 255
3. A result of an attempt to understand in detail how a certain result or event occurred.
4. (linguistics) A result of linguistic reconstruction; a model representing an unattested linguistic unit: a phoneme, a morpheme or a word.
  Quotations
  It should also be noted that while Dempwolff reconstructed at only one level (Uraustronesisch), many of his reconstructions are confined to languages of western Indonesia
  2016, Robert A. Blust, Austronesian Comparative Dictionary‎