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mighty

[mahy-tee]
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adjective, might·i·er, might·i·est.
  1. having, characterized by, or showing superior power or strength: mighty rulers.
  2. of great size; huge: a mighty oak.
  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.
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noun
  1. (used with a plural verb) mighty persons collectively (usually preceded by the): the rich and the mighty.
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Origin of mighty

before 900; Middle English; Old English mihtig. See might2, -y1
Related formsmight·i·ness, nouno·ver·might·y, adjectivequa·si-might·y, adjective

Synonyms

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1. strong, puissant. See powerful. 2. immense, enormous, tremendous, sizable.

Antonyms

1. feeble. 2. small.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for mightier

mighty

adjective mightier or mightiest
    1. having or indicating might; powerful or strong
    2. (as collective noun; preceded by the)the mighty
  1. very large; vast
  2. very great in extent, importance, etc
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adverb
  1. informal, mainly US and Canadian (intensifier)he was mighty tired
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Derived Formsmightiness, noun
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

Word Origin and History for mightier

mighty

adj.

Old English mihtig, earlier mæhtig, from miht (see might (n.)). Cf. Old Frisian mechtig, Old Saxon mahtig, Dutch machtig, German mächtig. As an adverb, it is attested from c.1300, though now considered colloquial.

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Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with mightier

mighty

see high and mighty.

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.