Definition

1. Adjective:

   • Countless, innumerable: Used to describe an extremely large, indefinite number of things that cannot be easily counted.
   • Having many varied elements: Used to describe something composed of a great and diverse multitude.

2. Noun:

   • A very great number: A large, indefinite, and countless number of people or things.
   • (Archaic) Ten thousand: In historical contexts, a specific number equal to ten thousand.

Examples of Usage

• Adjective:

  • The night sky was filled with myriad stars. (The night sky was filled with countless stars.)
  • She offered a myriad of excuses for being late. (She offered a vast number of excuses for being late.)

• Noun:

  • A myriad of problems arose from the new policy. (A great number of problems arose from the new policy.)
  • (Archaic) An army of ten thousand men was called a myriad. (An army of ten thousand men was called a myriad.)

Advanced Usage

• "Myriad of" vs. "Myriad" (Adjective): Traditionally, "myriad" was primarily a noun followed by "of" (e.g., a myriad of possibilities). In modern usage, it is also commonly and correctly used as an adjective directly before a noun (e.g., myriad possibilities). Both forms are widely accepted.
  • The project presented a myriad of challenges. (Noun form)
  • The project presented myriad challenges. (Adjective form)

Variants and Related Words

• Myriads (n, plural): Used to emphasize multiple vast multitudes.
  • Myriads of tiny creatures live in the soil. (Countless numbers of tiny creatures live in the soil.)
• Myriad-minded (adj, literary): Having countless facets to one's mind or personality; versatile.
  • Shakespeare is often described as the myriad-minded bard.

Synonyms

• Adjective: Countless, innumerable, untold, infinite, multitudinous, manifold.
• Noun: Multitude, host, swarm, sea, array, plethora.

Antonyms

• Adjective: Few, countable, limited, finite.
• Noun: Handful, few, scarcity, paucity.

Related Phrases and Idioms

• A myriad of choices/options: Used to describe a situation with an overwhelming number of possibilities.
  • The modern consumer faces a myriad of choices.
• In myriad ways: In countless or numerous different manners.
  • Technology has changed our lives in myriad ways.

Adjective

1. too numerous to be counted
   • incalculable riches
   • countless hours
   • an infinite number of reasons
   • innumerable difficulties
   • the multitudinous seas
   • myriad stars
   • untold thousands

Noun

1. the cardinal number that is the product of ten and one thousand
2. a large indefinite number
   • he faced a myriad of details