batman vs valet-de-chambre

batman

• A servant or valet to a military officer. 

• A unit of weight established in 1931 equal to 10 kg. 

• A Turkish unit of weight varying by location, time, and item from 2–8 okas (about 2.5–10 kg). 

• A personal assistant or supporter. 

• To climb up or down a rope free hand (i.e. as Batman does). 

• To act as a batman, wait on an officer. 

valet-de-chambre

• A valet. 

• The personal servant of a monarch.