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monarch

American  
[mon-erk, -ahrk] / ˈmɒn ərk, -ɑrk /

noun

monarchs plural
  1. a hereditary sovereign, as a king, queen, or emperor.

  2. a sole and absolute ruler of a state or nation.

  3. a person or thing that holds a dominant position.

    a monarch of international shipping.

  4. monarch butterfly.


monarch British  
/ ˈmɒnək, mɒˈnɑːkəl, mɒˈnɑːkɪəl /

noun

  1. a sovereign head of state, esp a king, queen, or emperor, who rules usually by hereditary right

  2. a supremely powerful or pre-eminent person or thing

  3. Also called: milkweed.  a large migratory butterfly, Danaus plexippus, that has orange-and-black wings and feeds on the milkweed plant: family Danaidae

"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

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Etymology

Origin of monarch

First recorded in 1400–50; late Middle English, from Middle French monarche, monarch, from Late Latin monarcha, from Greek mónarchos “sole ruler, monarch”; see mon-, -arch

Explanation

If you think the Queen of England is just the coolest thing ever, then you like monarchs: hereditary rulers of countries usually known as king or queen. You might think your principal rules with absolute power, but that's not really true: there's a school board and an administration and she can't really control everything. But a monarch can. Monarch comes from the Greek mono, "one," and archon, "ruler." Many modern monarchies actually have parliaments and constitutions, leaving the monarch more symbolic than powerful. A monarch is also a particularly royal looking butterfly with orange wings and black and white spots.

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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.

Monarch of the Glen, which hangs in the National Galleries of Scotland, is one of the most recognisable and reproduced paintings in British art.

From BBC • Jul. 2, 2026

In 2005 it appeared in Edinburgh alongside Monarch of the Glen as part of a major celebration of Landseer.

From BBC • Jun. 16, 2026

He described it as an atmospheric sister painting of the Monarch of the Glen, which hangs in the National Galleries of Scotland.

From BBC • Jun. 16, 2026

In November 2025, Monarch Tractor was sued by the Idaho-based dealership Burks Tractor, which accused Monarch of misrepresenting its autonomous technology.

From Los Angeles Times • Jun. 15, 2026

This revel is going to turn wilder, and with no new High Monarch on the throne, there is little holding any of the revelers back from any entertainment they can devise.

From "The Cruel Prince" by Holly Black

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