English Words Starting With D

• decimated

  adjectiveverbC1
  /ˈdɛsɪmeɪtɪd/To kill, destroy, or remove a large proportion of something; originally to kill one in every ten.
• decimation

  nounC1/C2
  /ˌdɛsɪˈmeɪʃ(ə)n/The act of killing or destroying a large proportion of a group; historically, the killing of every tenth person in a group as a punishment.
• decime

  nounExtremely Low
  /ˈdɛsɪmeɪ/A small, obsolete unit of currency; a tenth part of something (historically used in Argentina).
• decimeter

  nounC1/C2
  /ˈdɛsɪmiːtə/A unit of length in the metric system equal to one tenth of a metre (0.1 m).
• decimetre

  nounLow
  /ˈdɛsɪˌmiːtə/A metric unit of length equal to one-tenth of a metre.
• decipher

  verbverb-transitiveB2
  /dɪˈsaɪfə(r)/to convert a coded or unclear message into ordinary, understandable language
• decision

  nounverb-transitiveC1
  /dɪˈsɪʒ.ən/a choice or judgement made after considering different possibilities
• decision fatigue

  nounC1
  /dɪˈsɪʒ.ən fəˌtiːɡ/The deteriorating quality of decisions made by an individual after a long session of decision-making.
• decision procedure

  nounC2
  /dɪˈsɪʒən prəˈsiːdʒə(r)/A specific, finite, step-by-step method (algorithm) that, when applied to any input from a given set, is guaranteed to produce a correct yes/no answer for a particular question.
• decision support system

  nounC1
  /dɪˈsɪʒən səˈpɔːt ˈsɪstəm/A computer-based information system designed to assist with decision-making by collecting, analyzing, and presenting relevant data.
• decision table

  nounLow
  /dɪˈsɪʒ(ə)n ˌteɪbl̩/A structured, tabular tool used to model and analyse logic, rules, and their corresponding actions.
• decision theory

  nounC1+
  /dɪˈsɪʒən ˌθɪəri/A formal, mathematical framework for analyzing choices between alternative courses of action, especially under conditions of uncertainty, in order to identify the optimal choice.
• decision tree

  nounC2/Techical
  /dɪˈsɪʒən triː/A visual, hierarchical diagram representing a series of branching decisions and their possible consequences.
• decision-making

  nounC1
  /dɪˈsɪʒ.ənˌmeɪ.kɪŋ/The process of making a choice or coming to a conclusion.
• decisiveness

  nounC1
  /dɪˈsaɪ.sɪv.nəs/The quality of being able to make choices or reach decisions quickly and firmly; the quality of settling an issue definitively.
• decius

  nounVery Rare
  /ˈdiːsɪəs/A personal name, specifically a Roman family name (nomen gentilicium) and the name of a Roman emperor (Gaius Messius Quintus Traianus Decius, ruled 249–251 AD).
• deck

  adjectivenounverbverb-transitiveB1
  /dɛk/A flat, horizontal surface that forms a floor or platform, especially outdoors, on a ship, or a structure.
• deck beam

  nounVery Low (Specialized)
  /ˈdɛk ˌbiːm/A structural support running horizontally across the width of a ship's deck to provide strength and rigidity.
• deck bolt

  nounC1
  /ˈdɛk ˌbəʊlt/A heavy-duty fastener designed to securely connect structural members of a ship's deck, or more generally, any large bolt used in constructing a flat outdoor platform or in similar heavy construction.
• deck bridge

  nounLow (specialist term)
  /ˌdek ˈbrɪdʒ/A type of bridge where the main structural elements support the roadway from beneath it; the deck (roadway) sits on top of the primary supports (beams, trusses, or arches).

Showing 1201–1220 of 7181 words.