A register office is a place where births, marriages, and deaths are officially recorded, and where people can get married without a religious ceremony.
[British]
register office in British English
noun
British
a government office where civil marriages are performed and births, marriages, and deaths are recorded
Often called: registry office
Examples of 'register office' in a sentence
register office
There was Trevor, chief usher at the register office, with a white ribbon round his neck.
Isabel Wolff RESCUING ROSE (2002)
Seven months later they'd tied the knot at the register office and spent a week in the Caribbean.