Definition of "redouble"

redouble

verb
third-person singular simple present redoubles, present participle redoubling, simple past and past participle redoubled
1. (transitive) To double, especially to double again; to increase considerably; to multiply; to intensify.
  Quotations
  Every item of intelligence appeared to redouble the astonishment of the islanders, and they gazed at us with inquiring looks.
  1846, Herman Melville, Typee, ch. 10
  The police redoubled their efforts to capture the thieves.
  1903 October 21, “Plunder Hidden in Graves”, in New York Times, page 16
  With suggestions that inflation will rise above 15%, I have no doubt that today's trade union leaders will redouble their efforts to secure their members a good deal.
  2022 September 7, Philip Haigh, “Comment: More strikes and poor morale”, in RAIL, number 965, page 3
2. (bridge, backgammon) To double an opponent's doubling bid.
3. (intransitive) To become twice as big.
4. To double again what was reduced to a single state.
  Quotations
  Like the Conservatives and Labour, the Lib Dems plan to extend Britain's rail network, reopen stations and redouble singled routes.
  2019 December 4, “Lib Dems promise fares freeze and low-emission technology”, in Rail, page 6
noun
plural redoubles
1. (bridge) An optional bid made by the side currently holding the highest bid for the contract, after the opposing side has doubled.