Real Dictionary

vamp
countable noun: If you describe a woman as a vamp, you mean that she uses her sexual attractiveness to get what she wants.

vamp in American English 1
the part of a boot or shoe covering the instep and, in some styles, the toes
to play a vamp
to put a vamp on; provide or mend with a new vamp
intransitive verb: to improvise an accompaniment, tune, etc
noun: the portion of a shoe or boot upper that covers the instep and toes
transitive verb: to furnish with a vamp, esp. to repair (a shoe or boot) with a new vamp

vamp in American English 2
to act the part of a vamp
to seduce or beguile (a man) by using feminine charms
vampire (sense 3)
intransitive verb: to act as a vamp
noun: a seductive woman who uses her sensuality to exploit men
transitive verb: to use feminine charms upon; seduce

vamp in British English 1
noun: a seductive woman who exploits people by using her sexual charms
verb: to exploit (someone) in the fashion of a vamp

vamp in British English 2
noun: something patched up to make it look new
verb: to give a vamp to; make a renovation of