INTIMIDATE definition: 1. to frighten or threaten someone, usually in order to persuade them to do something that you want…. Learn more. Someone or something that causes fear is intimidating. Bullies are intimidating. Being mean and intimidating all the time can be exhausting and won't help you make any friends. However, there are times when it's absolutely necessary to scare people off a little bit and to assert yourself. If you need to be mean and... Intimidating definition: Sometimes intimidatory intended to frighten someone or to force or stop someone’s action through fear.. See examples of INTIMIDATING used in a sentence.