double

Made up of two matching or complementary elements.

The closet has double doors.

“[…] it is not fair of you to bring against mankind double weapons ! Such is not the usage of civilized warfare. Dangerous enough you are as woman alone, without bringing to your aid those gifts of mind suited to problems which men have been accustomed to arrogate to themselves.”

Of twice the quantity.

Give me a double serving of mashed potatoes.

The 40-year-old [Mike Skinner] is happy to put his body on the line in other ways, swapping a mug of tea for a fan's double pint of lager and messily necking it in one.

Of a family relationship, related on both the maternal and paternal sides of a family.

He's my double cousin as my mother's sister married my father's brother.

Designed for two (people, cars, etc.).

a double room

a double garage

Folded in two; composed of two layers.

Twice over; twofold; doubly.

February 7 1736, Jonathan Swift, letter to Alexander Pope I was double their age.

Two together; two at a time.

When I met the twins, I thought I was seeing double.

There are only a few beds, so some of the children will have to sleep double for the night.

Into two halves or sections.

The old man was bent double under his heavy burden.

Twice the number, amount, size, etc.

A person who resembles and stands in for another person, often for safety purposes

Saddam Hussein was rumored to have many doubles.

A drink with two portions of alcohol.

On second thought, make that a double.

A ghostly apparition of a living person; a doppelgänger.

According to the description our captain had given me of Peter Sandaker once when he had dropped behind on the march, he was particularly good at telling tales and stories about goblin-birds, doubles, and fairies, and had a special fancy for entering into the most minute details, whenever he commenced telling about one or the other of the eighteen bears he had killed in his time.

A sharp turn, especially a return on one's own tracks.