A remorseless or ruthless woman, especially one who assists or controls a weak man.
Origin
Late 18th century; earliest use found in John Ireland (c1742–1808), biographer. With allusion to the character of Lady Macbeth in Shakespeare's Macbeth.
Definition of Lady Macbeth in US English:
Lady Macbeth
noun
A remorseless or ruthless woman, especially one who assists or controls a weak man.
Origin
Late 18th century; earliest use found in John Ireland (c1742–1808), biographer. With allusion to the character of Lady Macbeth in Shakespeare's Macbeth.