English Words Starting With O

• opulence

  nounC1/C2
  /ˈɒp.jə.ləns/Great wealth or luxuriousness, abundant material possessions and comforts.
• opuntia

  nounLow (C2)
  /əʊˈpʌn.ti.ə/A type of cactus characterized by flat, fleshy, pad-like stems that are often covered in spines or glochids.
• opus

  nounC1
  /ˈəʊ.pəs/A substantial and important creative work, especially a musical composition or set of compositions, numbered to indicate its place in the artist's output.
• opus anglicanum

  nounVery Low (C2)
  /ˌəʊpəs æŋˈɡlɪkənəm/A medieval English style of highly detailed and skilled embroidery, typically using gold and silver thread, on luxury textiles for the church and nobility.
• opus dei

  nounLow
  /ˌəʊpəs ˈdeɪiː/In Roman Catholicism, the official Latin term for "the work of God"; primarily refers to the divine office, the daily cycle of prayers recited by priests and religious.
• opuscule

  nounVery low
  /ɒˈpʌskjuːl/A small or minor literary or musical work.
• opusculum

  nounVery low (extremely rare outside specialized contexts)
  /əʊˈpʌskjʊləm/A small or minor literary, musical, or artistic work.
• oquassa

  nounObscure/Rare
  /əʊˈkwæsə/A rare, landlocked freshwater trout native to a specific lake in Maine, USA.
• or circuit

  nounC2 / Specialized Technical
  /ɔː ˈsɜː.kɪt/A logic gate or electronic circuit that implements the logical OR operation; its output is true (or high) when at least one of its inputs is true.
• ora

  nounVery Low
  /ˈɔːrə/An interjection or temporal adverb meaning "now" or "at the present time" (from Latin).
• orach

  nounVery low / Specialized
  /ˈɒrətʃ/A leafy annual plant (genus Atriplex) of the goosefoot family, often cultivated for its edible leaves that resemble spinach.
• orache

  nounRare
  /ˈɒrɪtʃ/An edible plant of the genus Atriplex, with leaves sometimes used like spinach.
• oracle

  nounC1
  /ˈɒr.ə.kəl/A person or place (especially in ancient times) believed to give wise advice or infallible prophecies from a god.
• oracle bones

  plural-nounC2
  /ˈɒrək(ə)l bəʊnz/Ancient ox scapulae or turtle plastrons used in divination rituals in Shang dynasty China, often inscribed with the earliest known Chinese script.
• oracles

  plural-nounC1/C2
  /ˈɒr.ə.kəlz/Individuals believed to be able to deliver prophecies or divine wisdom, often through direct communication with a deity.
• oracy

  nounC2/Professional/Academic
  /ˈɔːrəsi/The ability to express oneself fluently, clearly, and effectively in speech, and to understand spoken language.
• oradea

  nounLow
  /ɒˈreɪ.dɪ.ə/A city in western Romania, near the Hungarian border.
• oral

  adjectivenounB2
  /ˈɔːrəl/Spoken or relating to the mouth.
• oral contraceptive

  nounC1
  /ˌɔː.rəl ˌkɒn.trəˈsep.tɪv/A pill taken by mouth to prevent pregnancy.
• oral eroticism

  nounLow
  /ˌɔːrəl ɪˈrɒtɪsɪz(ə)m/Psychosexual pleasure, excitation, or arousal derived from stimulation of the mouth and lips, including through kissing, sucking, and biting.

Showing 1621–1640 of 3187 words.