spend a fortune

先週 "break the bank" を採り上げましたが、Reader's Digest 4月号のTechコーナーの記事 "How to create a Wi-Fi hotspot" にも "break the bank" と同じ様な意味の表現がありました。
WANT ACCESS to Wi-Fi on your computer but don't want to spend a fortune on coffee at your local cafe? If you have a smartphone and a decent signal, the answer's in your pocket. By "tethering" your phone to your laptop or tablet, you can use the mobile network to get online and use a proper computer keyboard and screen instead of the miniature version.
"fortune" の意味としては幸運しか知らなかったのですが、上の最初の文に出てきた "spend a fortune" は文脈からして、大金を使う意味だろうと推測できます。辞書を見ます。
・Macmillan Dictionary: [singular] informal a lot of money: spend/pay a fortune: They must have spent a fortune on flowers alone.
・Oxford Dictionary: informal A surprisingly high price or amount of money: 'I spent a fortune on drink and drugs’