de facto

1 of 2

adverb

de fac·​to di-ˈfak-(ˌ)tō 

dā-,

dē-

: in reality : actually

became the leader de facto

de facto

2 of 2

adjective

1

: actual

especially : being such in effect though not formally recognized

a de facto state of war

Whatever it says on the calendar, Florida has de facto summer.

—E. L. Konigsburg

has become the movement's de facto spokesperson

2

: exercising power as if legally constituted

a de facto government

the de facto head of state

3

: resulting from economic or social factors rather than from laws or actions of the state

de facto segregation

Synonyms

Adjective

• actual
• real
• factual
• true
• very

Examples of de facto in a Sentence

Adjective

with the death of his father, he became the de facto head of the family

Recent Examples on the Web

Adverb

YouTube has slowly, then all at once, become the de facto home for what had been late night, not only for the shows on linear TV, but for an emerging crop of new talent born on the platform. —Alex Weprin, HollywoodReporter, 15 Oct. 2025

Whether or not OpenAI can deliver on every promise, the scale and speed of Stargate is already reshaping the market, adding hundreds of billions in market cap for its partners, and establishing OpenAI as the de facto market leader in AI infrastructure. —Mackenzie Sigalos, CNBC, 14 Oct. 2025

Adjective

But many supported the move and came to regard it as a de facto safe consumption site, a model that exists in cities around the world and in New York, where people can use drugs in a supervised setting. —Trisha Thadani, San Francisco Chronicle, 17 Mar. 2023

The trend has accelerated under the kingdom’s de facto ruler, Crown Prince Mohammed bin Salman, amid U.S. criticism of Saudi human-rights violations. —Ned Temko, The Christian Science Monitor, 14 Mar. 2023

Word History

Etymology

Adverb

borrowed from Medieval Latin, literally, "from the fact"

Adjective

derivative of de facto entry 1

First Known Use

Adverb

1601, in the meaning defined above

Adjective

circa 1689, in the meaning defined at sense 1

Legal Definition

de facto

1 of 2 adverb

de fac·​to di-ˈfak-tō, dā-, dē- 

: in reality : actually

these two constraints have been lifted, one de facto and one de jure

—Susan Lee

de facto

2 of 2 adjective

1

: actual

especially : being such in effect though not formally recognized see also de facto segregation at segregation

2

: exercising power as if legally constituted or authorized

a de facto government

a de facto judge

compare de jure

Etymology

Adverb

Medieval Latin, literally, from the fact