/ pɒʃ; NAmE pɑːʃ/ adjective ( posh·er , posh·est ) ( informal )
1.
elegant and expensive :
a posh hotel
You look very posh in your new suit.
2.
( BrE , sometimes disapproving ) typical of or used by people who belong to a high social class
SYN stylish :
a posh accent / voice
They live in the posh part of town.
They pay for their children to go to a posh school.
► posh adverb ( BrE ):
to talk posh
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WORD ORIGIN
early 20th cent.: perhaps from slang posh , denoting a dandy. There is no evidence to support the folk etymology that posh is formed from the initials of port out starboard home (referring to the more comfortable accommodation, out of the heat of the sun, on ships between England and India).