Definition of "rebuilding"

The complete 1892 rebuilding, indeed, followed an accident in 1890, when No. 6 ran away down the Buckley branch, and got badly smashed up in a collision at Connah's Quay.

1944 May and June, “Notes and News: A Much Transformed Locomotive”, in Railway Magazine, page 186

These have certainly witnessed many events of interest, chief among them, undoubtedly, being the rebuilding of the Bulleid Pacifics.

1961 March, C. P. Boocock, “The organisation of Eastleigh Locomotive Works”, in Trains Illustrated, page 160