English Words Starting With U

• ulterior motive

  nounC1
  /ʌlˈtɪə.ri.ə ˈməʊ.tɪv/A hidden, true reason for doing something, distinct from the reason given.
• ultima

  nounVery Low
  /ˈʌltɪmə/The last syllable of a word.
• ultima thule

  nounrare
  /ˈʌltɪmə ˈθjuːli/The farthest point or limit; a remote, unknown region.
• ultimacy

  nounC1-C2
  /ˈʌl.tɪ.mə.si/The state or fact of being final, fundamental, or most extreme.
• ultimate

  adjectivenounC1
  /ˈʌltɪmət/Being or happening at the end of a process; final.
• ultimate constituent

  nounC2
  /ˈʌltɪmət kənˈstɪtjuənt/The smallest meaningful unit in a linguistic analysis that cannot be broken down further without losing its meaning or function.
• ultimate strength

  nounMedium
  /ˈʌltɪmɪt ˈstreŋθ/The maximum stress or force that a material can withstand before breaking or failing.
• ultimatum

  nounC1
  /ˌʌl.tɪˈmeɪ.təm/A final demand or statement of terms, the rejection of which will result in retaliation or a breakdown in relations.
• ultimogeniture

  nounC2 / Very Rare
  /ˌʌltɪmə(ʊ)ˈdʒɛnɪtʃə/A system of inheritance in which the youngest child, particularly the youngest son, inherits the family estate or title.
• ultisol

  nounLow
  /ˈʌltɪsɒl/A highly weathered soil type with subsurface clay accumulation, typically found in humid tropical and subtropical regions.
• ultra

  adjectivenounmedium
  /ˈʌl.trə/Extreme or beyond the usual limit; often used as a prefix to denote excess or superiority.
• ultra filtration

  nounLow
  /ˌʌl.trə fɪlˈtreɪ.ʃən/A pressure-driven membrane separation process that removes suspended solids, bacteria, viruses, and high-molecular-weight substances from liquids by passing them through a semipermeable membrane with very fine pores.
• ultra-distance

  nounLow
  /ˌʌl.trə ˈdɪs.təns/A running or cycling race that is longer than a standard marathon distance, typically exceeding 50 kilometres.
• ultracentenarian

  adjectivenounRare
  /ˌʌl.trə.sen.tɪˈneə.ri.ən/A person who is 110 years old or older.
• ultracentrifuge

  nounverbverb-transitiveLow
  /ˌʌl.trəˈsen.trɪ.fjuːdʒ/A high-speed centrifuge used for separating fine particles in a liquid, typically in scientific laboratories.
• ultraconservative

  adjectivenounMedium
  /ˌʌltrəkənˈsɜːvətɪv/Holding or advocating extremely conservative views, especially in politics or religion.
• ultracrepidarian

  adjectivenounVery Low
  /ˌʌltrəkrɛpɪˈdɛːrɪən/A person who expresses opinions on matters beyond their knowledge or expertise; someone who offers unwarranted advice.
• ultrafiche

  nounVery Low
  /ˈʌl.trə.fiːʃ/A type of microfiche that can store a very large number of page images at a higher reduction ratio than standard microfiche.
• ultrafilter

  nounverb-transitiveC2
  /ˈʌltrəˌfɪltə/In mathematics, particularly set theory and topology, an ultrafilter is a maximal filter; it is a set of subsets of a given set that satisfies specific properties and cannot be enlarged without losing those properties.
• ultrafiltrate

  nounVery Low
  /ˌʌl.trəˈfɪl.treɪt/The liquid that has passed through an ultrafine filter, from which larger particles and molecules have been removed.

Showing 121–140 of 1514 words.