mighty

American  

[mahy-tee] / ˈmaɪ ti /

adjective

mightier, mightiest

1. having, characterized by, or showing superior power or strength.

   mighty rulers.

   Synonyms:

   puissant, strong

   Antonyms:

   feeble

2. of great size; huge.

   a mighty oak.

   Synonyms:

   sizable, tremendous, enormous, immense

   Antonyms:

   small

3. great in amount, extent, degree, or importance; exceptional.

   a mighty accomplishment.

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adverb

1. Informal. very; extremely.

   I'm mighty pleased.

noun

(used with a plural verb)

1. mighty persons collectively.

   the rich and the mighty.

mighty British  

/ ˈmaɪtɪ /

adjective

1. 1. having or indicating might; powerful or strong

   2. ( as collective noun; preceded by the )

      the mighty

2. very large; vast

3. very great in extent, importance, etc

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adverb

1. informal (intensifier)

   he was mighty tired

mighty Idioms  

1. see high and mighty.

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Usage

What does mighty mean? Mighty means extremely strong (as in a mighty warrior) or powerful (as in a mighty king). The noun might most commonly means great strength or power. People who are mighty in this way are sometimes referred to collectively as the mighty, in the same way that the rich is sometimes used, as in The rich and mighty hold all the power. The expression how the mighty have fallen is used to comment on a once powerful or popular person or thing that is now much less powerful or popular. Mighty can also mean of great size—especially big for its kind, as in a mighty oak.    Less commonly, mighty means of great importance, as in a mighty accomplishment. Sometimes, mighty is used as a very informal way of saying very or extremely, as in That’s a mighty fine hat you’re wearing. This use of mighty can sound a bit old-fashioned or folksy. The adverb form of mighty is mightily. The phrase high and mighty is often used as an adverb meaning in an arrogant or self-important manner, as in Please stop acting so high and mighty—you’re not the boss here. It can also be used as an adjective, in which case it’s often hyphenated (high-and-mighty). The phrase can also be used as a collective noun in the same way that mighty can, as in The high and mighty take too much and give too little. Example: He was a mighty ruler, and his empire extended to the ends of the earth.

Synonym Usage

See powerful.

Other Word Forms

Derived Forms

• overmighty
  adjective
• quasi-mighty
  adjective
• mightiness
  noun

Etymology

Origin of mighty

First recorded before 900; Middle English; Old English mihtig; see might ², -y ¹

Explanation

Something that's mighty is large and powerful. Mighty Mouse is no ordinary mouse; he's a superhero. It's best not to mess with anyone with mighty in their name. A mighty beast in a fairy tale is ferocious and intimidating, and a mighty power in the business world exerts great influence. Colloquially, you can also use mighty to emphasize something, or to mean "extremely." This informal use is especially common in the U.S. South, where a host might say, "We're mighty glad to have you!" Mighty comes from the Old English root mæht, "strength or power."

Example Sentences

Mighty lap in qualifying to only just miss out on pole.

From BBC • Jun. 7, 2026

The park hosts a series of events which attract hundreds of thousands of people, including Field Day and Mighty Hoopla.

From BBC • May 7, 2026

He teaches creative writing at Mighty Words Studio.

From Los Angeles Times • Mar. 6, 2026

In “The Mighty Continent,” he condenses a grand historical narrative into a conversational and erudite survey of a civilization that “invented the modern world.”

From The Wall Street Journal • Feb. 13, 2026

They are next to each other on tall wooden ladders, leaning against the billboard that tells the cars to stop and visit the One and Only Ivan, Mighty Silverback.

From "The One and Only Ivan" by Katherine Applegate

Related Words

• enormous
• huge
• imposing
• large
• magnificent
• massive
• towering