past participle adjective from consolidate. Of money, debt, etc., from 1753; in literal sense of "made firm, unified," from c.1850.
1510s, "to compact into one body," from Latin consolidatus, past participle of consolidare "to make solid," from com- "together" (see com-) + solidare "to make solid" (see solid). Meaning "to make firm or strong" is from mid-16c. Related: Consolidatedconsolidating.