a place from which an organization or a military operation is controlled; the people who work there The firm’s headquarters is/are in London. Several companies have their headquarters in the area. I'm now based at headquarters. police headquarters Headquarters in Dublin has/have agreed.Extra examples She works at the company’s headquarters. The company has set up its European headquarters in the UK. The company’s headquarters are located in Rome. The organization has its headquarters in Brussels. They’re planning to close their headquarters in Washington. They’re very worried about this at headquarters. Headquarters in Dublin have agreed. I’m now based at headquarters. There seems to be a rift between party headquarters and Downing Street.