Her decision to leave the company proved to be an 'expensive' mistake. [=a mistake that caused her to lose a lot of money]
They live in an 'expensive' neighborhood. [=a neighborhood in which houses, apartments, etc., cost a lot to buy or rent]
an 'expensive' shop [=a shop that sells expensive things]
(..) I was hailed as a visionary. Second time... ...I was asked politely to retire. So here I am, enjoying my retirement. Nothing is impossible, Mr. Angier. What you want is simply expensive. If I were to build for you this machine, you would be presenting it merely as illusion? Well, if people actually (..)2006 The Prestige