ˈbed.ə(r)mənt, -etə- noun
( -s )
1. : a making or becoming better : improvement: as
a. : an improvement of an estate (as by the addition of new buildings) that makes it better and more valuable than mere repairing would do
b. : an improvement (as of a highway, railroad, or business establishment) that does more than restore to a former good condition
c. : the replacement in accounting of an existing asset with one of greater cost or superior value
2. : the sum of money assessed, required, or used for a betterment
betterments for street construction
specifically : an expenditure that adds greater worth (as extended life or increased capacity) to a fixed asset