The Collaborative International Dictionary of English v.0.48:
Chamberlain \Cham"ber*lain\, n. [OF. chamberlain, chambrelencF.
chambellon, OHG. chamerling, chamarlinc, G. k[aum]mmerling,
kammer chamber (fr. L. camera) + -ling. See Chamber, and
-ling.] [Formerly written chamberlin.]
1. An officer or servant who has charge of a chamber or
2. An upper servant of an inn. [Obs.]
3. An officer having the direction and management of the
private chambers of a nobleman or monarch; hence, in
Europe, one of the high officers of a court.
4. A treasurer or receiver of public money; as, the
chamberlain of London, of North Wales, etc.
The lord chamberlain of England, an officer of the crown,
who waits upon the sovereign on the day of coronation, and
provides requisites for the palace of Westminster, and for
the House of Lords during the session of Parliament. Under
him are the gentleman of the black rod and other officers.
His office is distinct from that of the lord chamberlain
of the Household, whose functions relate to the royal