(~s)
1.
Your ~ is the person with whom you are having a conversation. (FORMAL)
Owen had the habit of staring motionlessly at his ~.
N-COUNT: oft poss N
2.
If a person or organization has a role as an ~ in talks or negotiations, they take part or act as a representative in them. (FORMAL)
...key ~s in the Middle East conference.
N-COUNT