Definition of high commission in US English:
 high commission
nounhī kəˈmiSHənhaɪ kəˈmɪʃən
An embassy of one British Commonwealth country in another.
 the Australian High Commission in Port Vila
 Example sentencesExamples
-  Before travelling anywhere, check the latest visa requirements well in advance, with your travel agent, tour operator or the embassy or high commission of the countries you intend to visit.
 -  Diplomats at the British high commission have been put on full alert and told to prepare for an evacuation at any time.
 -  Britain closed its embassy in Indonesia and high commission in Singapore.
 -  Security was also tightened around the British and Australian high commissions.
 -  The police force regularly updates the high commission in Delhi with progress and the investigation is constantly reviewed.