competitive exclusion

noun

The principle that states that two species who are very similar, and compete for the same resources, cannot coexist indefinitely, as the one with the slight advantage will outperform the other and eventually drive it into extinction.

Meanings

nouncompetitive exclusion (countable and uncountable, plural competitive exclusions)

plural competitive exclusions

  1. countableuncountablebiologyThe principle that states that two species who are very similar, and compete for the same resources, cannot coexist indefinitely, as the one with the slight advantage will outperform the other and eventually drive it into extinction.
    1 more example

    2016, Kaj-Kolja Kleineberg & Marián Boguñá, Competition between global and local online social networks, Nature In ecology theory, the principle of competitive exclusion states that multiple species in competition for the same resource cannot coexist, as even the slightest advantage of one species over the other is successively amplified; a mechanism referred to as “rich get richer” or preferential attachment. This eventually leads to the extinction of the inferior species.

Origin

Coined by Russian biologist Georgy Gause.

Full word history & related roots →
Cite this entry
APA

competitive exclusion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/competitive%20exclusion

MLA

“competitive exclusion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/competitive%20exclusion. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “competitive exclusion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/competitive%20exclusion.

Source: competitive exclusion on Wiktionary, CC BY-SA 4.0.