Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

1

ultra

play
adjective ul·tra \ˈəl-trə\

Definition of ultra

  1. :  going beyond others or beyond due limit :  extreme

See ultra defined for kids

People Are Reading

alt-5953d7f904965
'Patriot' Hasn't Always Been Positive
istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
June 2017 Words of the Day Quiz
image599301899
Pretty in 'Pink'
payday
How Often Is 'Biweekly'?

Examples of ultra in a Sentence

  1. espouses a kind of ultra conservatism that even some members of his own party cannot support

Origin and Etymology of ultra

ultra-

ultra Synonyms

Synonyms
extremist, fanatic (or fanatical), rabid, radical, revolutionary, revolutionist, extreme
Antonyms
middle-of-the-road, nonrevolutionary, unrevolutionary
Related Words
subversive, violent, wild; reactionary
Near Antonyms
conservative, moderate, temperate; conventional, orthodox, traditional; liberal, progressive
2

ultra

noun ul·tra

Definition of ultra

  1. :  one that is ultra :  extremist

Origin and Etymology of ultra

ultra-

ultra-

prefix ul·tra

Definition of ultra-

  1. 1 :  beyond in space :  on the other side :  trans- ultraviolet

  2. 2 :  beyond the range or limits of :  transcending :  super- ultramicroscopic

  3. 3 :  beyond what is ordinary, proper, or moderate :  excessively :  extremely ultramodern

  1. ultrabright

  2. ultracareful

  3. ultracasual

  4. ultracautious

  5. ultracheap

  6. ultrachic

  7. ultracivilized

  8. ultraclean

  9. ultracold

  10. ultracommercial

  11. ultracompact

  12. ultracompetent

  13. ultracompetitive

  14. ultraconservatism

  15. ultraconservative

  16. ultracontemporary

  17. ultraconvenient

  18. ultracool

  19. ultracritical

  20. ultrademocratic

  21. ultradense

  22. ultradistance

  23. ultradistant

  24. ultradry

  25. ultraefficient

  26. ultraenergetic

  27. ultraexclusive

  28. ultraexpensive

  29. ultrafamiliar

  30. ultrafast

  31. ultrafastidious

  32. ultrafeminine

  33. ultrafine

  34. ultraglamorous

  35. ultrahazardous

  36. ultraheat

  37. ultraheavy

  38. ultrahigh

  39. ultrahip

  40. ultrahot

  41. ultrahuman

  42. ultraleft

  43. ultraleftism

  44. ultraleftist

  45. ultraliberal

  46. ultraliberalism

  47. ultralightweight

  48. ultralow

  49. ultraluminous

  50. ultramasculine

  51. ultramilitant

  52. ultraminiaturized

  53. ultramodern

  54. ultramodernist

  55. ultranationalism

  56. ultranationalist

  57. ultranationalistic

  58. ultraorthodox

  59. ultrapatriotic

  60. ultraphysical

  61. ultraposh

  62. ultrapowerful

  63. ultrapractical

  64. ultraprecise

  65. ultraprecision

  66. ultraprofessional

  67. ultraprogressive

  68. ultrapure

  69. ultraquiet

  70. ultraradical

  71. ultrarapid

  72. ultrarare

  73. ultrarational

  74. ultrarealism

  75. ultrarealist

  76. ultrarealistic

  77. ultrarefined

  78. ultrareliable

  79. ultrareligious

  80. ultrarespectable

  81. ultrarevolutionary

  82. ultrarich

  83. ultraright

  84. ultrarightist

  85. ultraromantic

  86. ultraroyalist

  87. ultrasafe

  88. ultrasecret

  89. ultrasensitive

  90. ultraserious

  91. ultrasharp

  92. ultrasimple

  93. ultraslick

  94. ultraslow

  95. ultrasmall

  96. ultrasmart

  97. ultrasmooth

  98. ultrasoft

  99. ultrasophisticated

  100. ultrathin

  101. ultratiny

  102. ultratraditional

  103. ultravacuum

  104. ultraviolence

  105. ultraviolent

  106. ultrawide

See ultra- defined for English-language learners

See ultra- defined for kids

Origin and Etymology of ultra-

Latin, from ultra beyond, adverb & preposition, from *ulter situated beyond — more at ulterior

ULTRA Defined for English Language Learners

ultra-

prefix

Definition of ultra- for English Language Learners

  • : beyond : extremely : more than is usual

  • : beyond the range or limits of

ULTRA Defined for Kids

ultra

play
adjective ul·tra \ˈəl-trə\

Definition of ultra for Students

  1. :  1extreme 1 ultra plush chair

ultra-

prefix ul·tra

Definition of ultra- for Students

  1. 1 :  beyond in space :  on the other side ultraviolet

  2. 2 :  beyond the limits of :  super-

  3. 3 :  beyond what is ordinary or proper

Learn More about ultra

  1. Thesaurus: All synonyms and antonyms for ultra Britannica.com: Encyclopedia article about ultra

Seen and Heard

What made you want to look up ultra? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

culminate

play

to reach the highest or a decisive point

Get Word of the Day daily email!

TRENDING NOW

  1. bona fide Made in good faith

  2. surrogate mother From TMZ to the dictionary.

  3. zealot A fanatical partisan

  4. stonewall to be uncooperative, obstructive, or evasive

  5. scurrilous Containing obscenities, abuse, or slander

SEE ALL

BROWSE DICTIONARY

ultra

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

alt-5953d7f904965
'Patriot' Hasn't Always Been Positive

The word has roots in a religious rivalry

alt-5949565fc7d94
'Negging' Moves Beyond The Bar

Not just for pick-up artists anymore

alt-5947fc40f1b5c
In Tech, What Does 'K' Mean?

A buzzword with a long history.

alt-5951697e1a410
When To Use 'Specious' vs. 'Spurious'

These similar words are not interchangeable

Ask the Editors

payday
How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

decimate-video
Is it wrong to use 'decimate' to mean 'destroy'?

Language changes

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
June 2017 Words of the Day Quiz

Summer's first WOTD quiz.

Take the quiz
alt-5941ad7527c3c
Yearbook Superlatives Quiz

Is that your picture under "Largest Vocabulary"?

Take the quiz
True or False
True or False?

Test your knowledge - and maybe learn something along the way.

Take the quiz
SCRABBLE® Sprint
SCRABBLE® Sprint

SCRABBLE® fans, sharpen your skills!

Play the game
Examples: ultra in a Sentence