A New World passerine bird; Turdus migratorius.

A small passerine Old World bird; Erithacus rubecula.

(chiefly attributive) Anything ingenious (and often complex) but absurdly impractical or even useless.

Very quickly; quicker than one expects.

(dated) dressing gown

Alternative spelling of robber baron

(historical) In Europe, an aristocrat who charged exorbitant fees or otherwise exacted money from people who journeyed across land or waterways which he controlled.

That can be robbed; susceptible to robbery.

A game played by schoolchildren in which the "robbers" have to steal "gold" and return it to their "base" without being caught by the "cops" and taken to "jail". When in "jail", "prisoners" can be "freed" by other "robbers".

(Britain) The European robin. / Any robin. / (UK, slang, historical) A Bow Street Runner (from the colour of his waistcoat).