Couple
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Couple, as a noun, is close in meaning to pair, can refer to:
- two of any similar items;
- the publicly social bond between two people (most often heterosexual, but common use has also increasingly included homosexuals) in a sexual relationship:
- husband and wife;
- girlfriend and boyfriend;
- two girlfriends (not to be confused with the platonic use of the word "girlfriend");
- two boyfriends;
- a small indefinite number, usually but not exclusively 2 (number).
To couple, as a verb, means to join together or connect.
Mechanics
Two equal and opposite forces whose lines of action do not coincide are known as a couple. The forces have a turning effect or moment called a torque.