mean business

Idioms

Be in earnest. For example, He really means business with this deadline. This idiom uses business in the sense of “a serious endeavor.” [Mid-1800s]

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Drones and anti-drones mean business for a host of defense startups and established players.

From Barron's • Feb. 11, 2026

They showed why they mean business in Switzerland, beating Wales 6-1 after a crucial 4-0 win over the Netherlands.

From BBC • Jul. 13, 2025

According to local reporting, members said the reason for the act of civil disobedience was to show the casinos that they mean business and that they’re willing to sit down in traffic for a contract.

From Washington Times • Oct. 26, 2023

The memo suggested wearing costumes “inspired by generalized characters and figures” — such as ghosts, zombies or spiders — to show the studios they mean business, even on a holiday.

From Los Angeles Times • Oct. 19, 2023

But I decide to include it because anything that can start out floating around defenseless in the ocean that size—and then defeat the odds to grow into this powerful creature—has to mean business.

From "The Benefits of Being an Octopus" by Ann Braden

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023