/ˈpraɪˌmɛri ˈrɛzɪdəns/ – Phrase
Definition: Nơi cư trú chính thức.
A more thorough explanation: the house or apartment etc where a person lives for most of the time
Example: I am writing to confirm that 17 York Road, Waldingfield is now my primary residence and no longer used as a second home.