This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of double.

n. The act of one that doubles; a making double; reduplication; also, that which is doubled.

n. A turning and winding; ; shift; trick; artifice.

n. The lining of the mantle borne about the shield or escutcheon.

n. The process of redistilling spirits, to improve the strength and flavor.

n. raising the stakes in a game, such as a card game or backgammon, by a factor of 2.

n. Something doubled or folded over; a fold; a plait; specifically (nautical), the doubled edge or skirt of a sail.

n. That the addition of which makes double.

n. pl Naut., that part of a mast included between the trestletrees and the cap.

n. The second distillation of wine.

n. The act of marching at the double-quick.

n. In botany, same as chorisis.

Shifting; manœuvering.

n.

n. In textile-manuf., any process of combining two (or more) slivers and drawing them into a single sliver of smaller size than any of the separate ones, for the purpose of making more uniform roving.

n. In weaving, the process of winding two threads or rovings upon a spool or bobbin.

n. In biology, same as reduplication: said of the chromosomes and centrosomes of the cell when they undergo fission.

n. In bridge, the act of doubling the value of the trick points after the dealer's side has declared. See bridge.

n. In the production of metallic antimony from its ore, the remelting of the singles, or lumps of crude metal first obtained, and the mixing, in due proportion, of those containing surplus iron and those containing unseparated sulphur. The product of this second fusion is called bowl-metal because poured out into and solidified in a bowl of cast-iron.

n. In bookbinding, the thickening of the covers of a book by the addition of thick paper or thin boards.

n. increase by a factor of two

n. raising the stakes in a card game by a factor of 2

"He devotes a chapter to the "surge", what he calls a doubling down on his original bet, increasing the number of US troops in Iraq in 2007."

promontory   

multiplication    raise   

doubling in balk    doubling of the bow   

reduplication    shift    trick    artifice    duplicature    gemination    duplication    conduplication    duplation   

double   

bubbling    redoubling    troubling