To have or hog all of something by oneself; to monopolize (an object, attention, popularity, etc.).
子どもが新しいおもちゃを独り占めして、兄弟に貸そうとしない。
The child is hogging the new toy and won't lend it to his siblings.
彼のユーモアが場を独り占めした。
His humor monopolized the room (everyone focused on him).
新商品は一部の店舗で独り占めされているらしい。
It seems the new product is being monopolized by some stores.