1. not conforming to approved standards of social or professional behavior

    Antonyms : ethical
    Examples :
    • unethical business practices


  1. the act of sustaining life by food or providing a means of subsistence

    Synonyms : maintenance, sustainment, sustenance, sustentation
    Type Of : support
  2. activity involved in maintaining something in good working order

    Synonyms : care, maintenance
    Type Of : fixing, fixture, repair, reparation, fix, mend, mending


  1. healing process involving the growing together of the edges of a wound or the growing together of broken bones

    Synonyms : conglutination
    Type Of : healing
  2. being of or having to do with the northern United States and those loyal to the Union during the American Civil War

    Synonyms : federal
  3. the act of pairing a male and female for reproductive purposes

    Synonyms : conjugation, coupling, mating, pairing, sexual union
    Type Of : sexual activity, sex, sex activity, sexual practice
  4. a set containing all and only the members of two or more given sets

    Synonyms : join, sum
    Type Of : set
    Examples :
    • let C be the union of the sets A and B
  5. an organization of employees formed to bargain with the employer

    Synonyms : brotherhood, labor union, trade union, trades union
    Type Of : organisation, organization
    Examples :
    • you have to join the union in order to get a job
  6. the state of being a married couple voluntarily joined for life (or until divorce)

    Synonyms : marriage, matrimony, spousal relationship, wedlock
    Type Of : marital status
    Examples :
    • God bless this union
  7. the United States (especially the northern states during the American Civil War)

    Synonyms : north
  8. the state of being joined or united or linked

    Synonyms : unification
    Antonyms : separation
    Type Of : state
    Examples :
    • there is strength in union
  9. the act of making or becoming a single unit

    Synonyms : conjugation, jointure, unification, uniting
    Antonyms : disunion
    Type Of : combination, combining, compounding
    Examples :
    • the union of opposing factions
  10. a device on a national flag emblematic of the union of two or more sovereignties (typically in the upper inner corner)

    Type Of : device
  11. a political unit formed from previously independent people or organizations

    Type Of : political entity, political unit
  12. of trade unions

    Antonyms : nonunion
    Examples :
    • the union movement
    • union negotiations
    • a union-shop clause in the contract
  13. the occurrence of a uniting of separate parts

    Type Of : occurrence, occurrent, happening, natural event
    Examples :
    • lightning produced an unusual union of the metals


  1. not perceived or discerned

    Antonyms : detected
    Examples :
    • they feared some undetected trace of poison
    • she looked around to be sure her faux pas was undetected


  1. a collarless men's undergarment for the upper part of the body

    Synonyms : singlet, vest
    Type Of : undergarment, unmentionable


  1. having no beneficial use or incapable of functioning usefully

    Antonyms : useful
    Examples :
    • a kitchen full of useless gadgets
    • she is useless in an emergency


  1. being of use or service

    Synonyms : utile
    Antonyms : useless
    Examples :
    • the girl felt motherly and useful
    • a useful job
    • a useful member of society
  2. having a useful function

    Synonyms : utilitarian


  1. not yet discovered

    Synonyms : unexplored
    Examples :
    • undiscovered islands
  2. not discovered

    Examples :
    • with earth-based telescopes many stars remain undiscovered


  1. disturb the composure of

    Synonyms : enervate, faze, unnerve
    Type Of : discomfit, discompose, disconcert, untune, upset


  1. lacking systematic arrangement or method or organization

    Antonyms : systematic
    Examples :
    • unsystematic and fragmentary records
    • he works in an unsystematic manner