English Words Starting With O

• oberhausen

  nounLow
  /ˌəʊ.bə(r)ˈhaʊ.zən/A German city in the Ruhr region, North Rhine-Westphalia, known historically for its industrial heritage.
• oberland

  nounRare
  /ˈəʊbəˌlænd/A proper noun referring to a region of elevated land, particularly in Alpine contexts (e.g., Bernese Oberland in Switzerland).
• oberlin

  nounLow
  /ˈəʊbəlɪn/A proper noun, typically referring to Oberlin College, a private liberal arts college in Oberlin, Ohio, United States.
• oberon

  nounVery Low
  /ˈəʊbərɒn/A literary and mythological name; most commonly, the king of the fairies in medieval and Shakespearean legend.
• oberosterreich

  nounRare
  /ˌəʊbərˈɜːstəraɪx/A federal state (Bundesland) in northern Austria; Upper Austria.
• oberth

  nounVery Rare / Highly Technical
  /ˈəʊbəːθ/In astronautics, a high-speed trajectory or flyby of a celestial body (usually a planet) that uses the body's gravity to gain a significant increase in a spacecraft's speed and energy, relative to the Sun.
• obesity

  nounB2
  /əʊˈbiːsəti/A chronic medical condition characterized by an excessive accumulation of body fat that presents a risk to health.
• obesogen

  nounVery low
  /əʊˈbiːsədʒ(ə)n/A chemical compound (natural or synthetic) that disrupts normal metabolism, promoting weight gain and obesity.
• obey

  verbverb-intransitiveverb-transitiveB1
  /ə(ʊ)ˈbeɪ/To comply with or follow the commands, instructions, or wishes of someone or something, especially an authority.
• obfuscate

  verbverb-intransitiveverb-transitiveC1
  /ˈɒbfəskeɪt/To make something obscure, unclear, or unintelligible, often deliberately.
• obi

  nounRare/C1+
  /ˈəʊ.bi/A broad sash worn as part of a traditional Japanese kimono outfit.
• obie

  nounVery Low
  /ˈəʊbi/An award given for excellence in Off-Broadway theater in the United States.
• obit

  nounRare
  /ˈɒbɪt/A record or announcement of a person's death, especially in a newspaper; a short obituary.
• obiter dictum

  nounC2
  /ˌɒbɪtə ˈdɪktəm/A judge's incidental remark or observation made in passing during a legal opinion, which is not essential to the decision and does not establish precedent.
• obituary

  adjectivenounC1
  /əˈbɪtʃuəri/A notice published in a newspaper or online announcing a person's death and often containing a short biography and details of the funeral.
• object

  nounverb-intransitiveverb-transitiveHigh
  /ˈɒbdʒɪkt/ (noun), /əbˈdʒekt/ (verb)A tangible or intangible thing that can be perceived or thought about.
• object ball

  nounC2
  /ˈɒb.dʒɪkt ˌbɔːl/In cue sports, the specific ball at which the player is aiming with the cue ball.
• object code

  nounC2
  /ˈɒb.dʒekt ˌkəʊd/Machine-readable code generated by a compiler from source code.
• object complement

  nounLow
  /ˈɒb.dʒekt ˈkɒm.plɪ.mənt/A word or phrase that follows and describes or renames the direct object of a verb.
• object distance

  nounC1
  /ˈɒb.dʒɪkt ˈdɪs.təns/In optics and photography, the distance between the subject (object) being viewed or photographed and the lens or viewing apparatus.

Showing 101–120 of 3187 words.