Sentence:  It turned out she was posh, or posh-ish, having been to a <WSD>public school</WSD> somewhere in Hampshire. 
Meaning of the word marked with <WSD> tags:  Certain private schools, particularly (initially) any grammar school operated apart from the personal lands of its students or (from the 19th century) the fee-paying secondary schools which developed from or were modelled upon them; a British boarding school