DictionarymyriadVery large number
noun / adjective

myriad

MEER-ee-ud/mˈɪriʌd/

A very large or countless number.

A myriad of small fish fills the densely packed shoal.

An immense school of small silver-blue fish: individually recognizable fish in the foreground merge into hundreds of tiny fish receding through a broad, densely populated shoal.
Etymology

Greek myrias could mean either a group of ten thousand or countless numbers. The English sense preserves that expansive use, expressing a vast quantity rather than an exact count.

In context

Get.factual32:56
There are billions of them in one compost heap, more than there are people on Earth. A myriad of fruit flies is also drawn to the fermenting mass.
The Secret Garden - Springtime's Micro-Ecosystems - Full Nature Documentary

More examples

  • The project faces myriad challenges.
  • Myriads of stars fill the clear night sky.
  • She finds a myriad of ways to save money.

Forms

myriad · myriads

Similar words

multitude
A large number, without implying that counting is impossible.
countless
Describes things too numerous to count; used only adjectivally.