couple

1. Two partners in a romantic or sexual relationship.
2. Two of the same kind connected or considered together.
3. A small number.
4. One of the pairs of plates of two metals which compose a voltaic battery, called a voltaic couple or galvanic couple.
5. Two forces that are equal in magnitude but opposite in direction (and acting along parallel lines), thus creating the turning effect of a torque or moment.
6. A couple-close.
7. That which joins or links two things together; a bond or tie; a coupler.

1. To join (two things) together, or (one thing) to (another).

   I've coupled our system to theirs.

2. To join in wedlock; to marry.
3. To join in sexual intercourse; to copulate.

adjective

Two or (a) small number of.