Bestseller (noun)

1. A book, product, or service that sells well and is among the most popular in its category.
2. A work that is highly successful in terms of sales and popularity.

Origin:

The word bestseller is a compound word made up of the words "best" and "seller" which refers to a book, product, or service that sells well and is among the most popular in its category.

Examples:

1. The author's latest novel became a bestseller within a week of its release.
2. The company's newest product is a bestseller in its category.
3. The new phone is a bestseller and is hard to find in stock.
4. The book made it to the top of the bestseller list.
5. The singer's latest album was a bestseller and sold out in all the music stores.