1. double fault (tennis) two successive faults in serving resulting in the loss of the point
  2. double flat a musical notation of two flats in front of a note indicating that it is to be lowered by two semitones
  3. double salt a solution of two simple salts that forms a single substance on crystallization
  4. double-faced (of fabrics) having faces on both sides
  5. pole vault a competition that involves jumping over a high crossbar with the aid of a long pole
  6. double gold very tall branching herb with showy much-doubled yellow flower heads
  7. Denali Fault a major open geological fault in Alaska
  8. double first a first-class honours degree in two subjects
  9. table salt white crystalline form of especially sodium chloride used to season and preserve food
  10. default an option that is selected automatically
  11. double talk deliberately unintelligible gibberish
  12. double eagle a former gold coin in the United States worth 20 dollars
  13. double feature two games instead of one
  14. doubtful fraught with uncertainty
  15. double agent a spy who works for two mutually antagonistic countries
  16. football field the playing field on which football is played
  17. double digit a two-digit integer; from 10 to 99
  18. double blind a test procedure in which the identity of those receiving the intervention is concealed from both the administrators and the subjects until after the test is completed; designed to reduce or eliminate bias in the results
  19. double date a date in which two couples participate
  20. doublet a man's close-fitting jacket, worn during the Renaissance

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