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1850, from re- "again" + vamp (v.) "patch up, replace the upper front part of a shoe." An earlier verb was new-vamp (1630s). Modern use is typically figurative. Related: Revamped; revamping.
To improve by remaking; renovate; revise: We can't just patch it up; we need to revamp the whole proposal
[1850+; fr shoemakers, ''to replace the upper front part of a shoe'']