Adjective posh has 1 sense

1. classy, posh, swish - elegant and fashionable; "classy clothes"; "a classy dame"; "a posh restaurant"; "a swish pastry shop on the Rue du Bac"- Julia Child
   Antonyms: styleless, unstylish (indirect, via stylish)
   

Posh

Adjective: indicating or characterized by high social status or wealth; stylishly elegant.

Example Sentences:

• She always stays at posh hotels whenever she travels.
• The restaurant has a posh dining atmosphere with dimmed lights and luxurious decor.
• He wore a posh suit to the gala event, making him stand out among the crowd.

Noun: a term used to describe something that is fashionable, luxurious, or of high quality.

Example Sentence:

• The interior of the private yacht was the epitome of posh.

Verb: to make something appear posh or luxurious; to upgrade or enhance.

Example Sentence:

• They spent a significant amount of money to posh up their beach house.