Definition from Wiktionary, the free dictionary
Proper noun 
- In a mythological personification, justice symbolized as a blindfolded young lady, similar to Lady Luck.
- A female judge, as in "Her Lady Justice."
- 1888, Edward Livermore Burlingame, Scribner's magazine, p. 35:
- ... Before our Lady Justice calm he stands
- To hear her grave, immutable commands ;
- ... She holds the balance true, with steady hands
- And strong, the little while wavereth.