Keystone — Meaning, Definition & Synonyms

noun /ˈkē-ˌstōn/ key·stone

Meaning & Definition of Keystone

Keystone (noun)

  1. the wedge-shaped piece at the crown of an arch that locks the other pieces in place
  2. something on which associated things depend for support
  3. a species of plant or animal that produces a major impact (as by predation) on its ecosystem and is considered essential to maintaining optimum ecosystem function or structure

Origin & Etymology of Keystone

First known use: circa 1637

Frequently Asked Questions about Keystone

What does "Keystone" mean?

"Keystone" means the wedge-shaped piece at the crown of an arch that locks the other pieces in place. As a noun, it is defined as: the wedge-shaped piece at the crown of an arch that locks the other pieces in place. It has 3 distinct senses.

Is "Keystone" a noun, verb, or adjective?

"Keystone" is a noun.

How do you pronounce "Keystone"?

"Keystone" is pronounced /ˈkē-ˌstōn/ and divided into syllables as key·stone.

What is the origin of the word "Keystone"?

First known use: circa 1637.