double date
noun
a date on which two couples go together.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They had been double-dating with another couple and she and the other girl got into a discussion about engagement rings, talking about how big a diamond would have to be to be acceptable.
From New York Times ● Sep. 12, 2013