1. [18C+] a nobleman, a gentleman.
2. [early 19C; 1910s] (Aus.) an expert [from sense 1].
[1990s+] the elite.
[mid-19C] aristocratic; showy.
[early 19C+] to give oneself airs.
[mid-19C] (UK Und.) to pose as an aristocrat to defraud tradesmen.
[1900s] (Aus.) upper-class.
[mid-19C] a judge.
[early 19C] (UK Und.) to use brains rather than brawn to succeed in the world.
[mid-19C] the Houses of Parliament.