English Words Starting With O

• obversion

  nounC2
  /ɒbˈvɜːʃ(ə)n/In logic, the operation of changing the quality of a proposition (e.g., from affirmative to negative) and replacing its predicate with the complement, yielding an equivalent statement.
• obvert

  verbverb-transitiveRare/Very Low Frequency
  /ɒbˈvəːt/To turn something, especially an argument or statement, so as to present a different aspect or side; in logic, to infer the obverse of a proposition.
• obviate

  verbverb-transitiveC1
  /ˈɒb.vi.eɪt/To remove or get rid of a problem, need, or requirement, so that it is no longer necessary.
• obwalden

  nounVery Low
  /ˈɒbvɑːldən/A canton (state) in central Switzerland.
• obˈserver

  nounB2
  /əbˈzɜːvə(r)/A person who watches, notices, or pays attention to something, often without directly participating.
• oca

  nounLow
  /ˈəʊkə/A type of edible tuber native to the Andes, also known as New Zealand yam.
• ocala

  nounRare
  /əʊˈkɑːlə/A proper noun, primarily referring to a city in Florida, USA.
• ocarina

  nounC1
  /ˌɒk.ərˈiː.nə/A small, simple wind instrument, typically egg-shaped with finger holes and a mouthpiece.
• occam

  nounRare
  /ˈɒkəm/A surname; most famously, William of Ockham (also spelled Occam), a 14th-century English Franciscan friar, philosopher, and theologian.
• occam's razor

  nounC1-C2
  /ˌɒkəmz ˈreɪzə/A philosophical principle stating that among competing explanations, the simplest one with the fewest assumptions is usually correct.
• occasion

  nounverbverb-transitiveB1
  /əˈkeɪʒ(ə)n/A particular time, event, or situation, especially one that is special or noteworthy.
• occasional licence

  nounC1
  /əˌkeɪʒənəl ˈlaɪsəns/A temporary licence granted by a magistrate or other authority to sell alcoholic drinks at a specific event or location for a limited time.
• occasional table

  nounC1
  /əˌkeɪʒənəl ˈteɪbəl/A small, portable table intended for use only when needed, such as for holding drinks or books temporarily.
• occasionalism

  nounC2
  /əˌkeɪʒ(ə)n(ə)ˈlɪz(ə)m/A philosophical theory that denies direct causation between physical events, asserting that God causes them on the occasion of apparent causes.
• occasions

  plural-nounB1
  /əˈkeɪʒənz/Specific times when something happens; particular events or instances.
• occident

  nounC2/Rare
  /ˈɒksɪd(ə)nt/the countries of the West, especially Europe and the Americas
• occidental

  adjectivenounLow
  /ˌɒk.sɪˈden.təl/relating to the countries of the West, especially Europe and the Americas; western.
• occidentalism

  nounLow
  /ˌɒksɪˈdɛntəlɪzəm/The study, appreciation, or imitation of Western cultures, ideas, and social patterns.
• occidentalize

  verbverb-transitiveC2 / Very Rare
  /ˌɒk.sɪˈden.təl.aɪz/to make something or someone more like the cultures, customs, or ideas of Western Europe and North America.
• occipital

  adjectivenounC2
  /ɒkˈsɪp.ɪ.təl/Relating to the back part of the head or skull.

Showing 261–280 of 3187 words.