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bastard

American  
[bas-terd] / ˈbæs tərd /

noun

  1. a person born of unmarried parents; an illegitimate child.

  2. Slang.

    1. a vicious, despicable, or thoroughly disliked person.

      Some bastard slashed the tires on my car.

    2. a person, especially a man.

      The poor bastard broke his leg.

  3. something irregular, inferior, spurious, or unusual.

  4. bastard culverin.


adjective

  1. illegitimate in birth.

  2. spurious; not genuine; false.

    The architecture was bastard Gothic.

    Synonyms:
    phony, irregular, sham, imperfect, imitation, fake
  3. of abnormal or irregular shape or size; of unusual make or proportions.

    bastard quartz; bastard mahogany.

  4. having the appearance of; resembling in some degree.

    a bastard Michelangelo; bastard emeralds.

  5. Printing. (of a character) not of the font in which it is used or found.

bastard British  
/ ˈbæs-, ˈbɑːstəd /

noun

  1. informal an obnoxious or despicable person

  2. informal a person, esp a man

    lucky bastard

  3. informal something extremely difficult or unpleasant

    that job is a real bastard

  4. old-fashioned a person born of unmarried parents; an illegitimate baby, child, or adult

  5. something irregular, abnormal, or inferior

  6. a hybrid, esp an accidental or inferior one

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adjective

  1. old-fashioned illegitimate by birth

  2. irregular, abnormal, or inferior in shape, size, or appearance

  3. resembling a specified thing, but not actually being such

    a bastard cedar

  4. counterfeit; spurious

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of bastard

First recorded in 1250–1300; Middle English, from Anglo-French bastard, from Medieval Latin bastardus, perhaps ultimately from Germanic bāst-, bōst- (unrecorded) “marriage” + Old French -ard -ard, taken as signifying the offspring of a polygynous marriage to a woman of lower status, a pagan tradition not sanctioned by the church; compare Old Frisian bost “marriage,” see also bind; the traditional explanation of Old French bastard as derivative of fils de bast “child of a packsaddle” is doubtful on chronological and geographical grounds

Explanation

Bastard used to be a not nice thing you called a child whose parents weren't married. But now it's a more general insult hurled toward a jerk or bad person. Bastard can also simply mean "fraudulent." This is a great example of how words change in meaning over time. Today, if you were called a bastard, it probably has nothing to do with whether or not your parents are married: it just means someone doesn't like you (unless they call you a magnificent bastard, which is a compliment). Bastard can also mean phony or fake, like a bastard version of French that is not correct. When you think bastard, think illegitimate.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This tour is reported to include all surviving Wu-Tang Clan members and ODB’s son, Young Dirty Bastard, in the lineup — a contrast to past runs that often didn’t include the full crew.

From Los Angeles Times • Feb. 24, 2025

Keith Robinson, a Comedy Cellar regular who mentored Hart when he was known as Lil’ Kev the Bastard, steals the show as a Jedi master for comedians.

From New York Times • Dec. 12, 2023

Yet “as the weeks passed, the mood became one of despair,” writes Anna Whitlock, author of Mary Tudor: Princess, Bastard, Queen.

From National Geographic • Sep. 11, 2023

“Let’s not be fooled,” said Daniel Bastard, the Asia-Pacific director for Reporters Without Borders.

From Washington Post • Aug. 18, 2022

“The Bastard of Bolton?” asked Qarl, beside her.

From "A Dance with Dragons" by George R. R. Martin