(~s, ~ing, ~ed)
If two people are ~ing, they are living together and have a sexual relationship, but are not married. (FORMAL)
In Italy people hardly ever ~...
The dentist left his wife of 15 years and openly ~ed with his receptionist...
Any solicitor will tell you, if you’re ~ing and the man leaves you, you haven’t got a leg to stand on.
V-RECIP: pl-n V, V with n, V (non-recip)
~ation
The decline in marriage has been offset by a rise in ~ation.
N-UNCOUNT