informal
■ adjective
1》 elegant or stylishly luxurious.
2》 chiefly Brit. upper-class.
■ adverb Brit. in an upper-class way.
■ verb ( ~ something up ) Brit. smarten something up.
Derivatives
~ly adverb
~ness noun
Word History
Posh is first recorded in the early 20th century. Its origin is unknown: it may come from the obsolete thieves' slang word ~ , which meant either 'money' or 'a dandy'. There is no basis for the popular theory that ~ is an acronym of port out starboard home , referring to the choice of more expensive berths, out of the heat of the sun, on ships between England and India.