RAII
noun
RAII is a noun meaning “Initialism of Resource Acquisition Is Initialization, a popular design pattern in object-oriented programming that ties resources to the lifespan of…” (English Wiktionary, September 2026). It is spelled R-A-I-I, and it appears about once in every 42 million words in written English (wordfreq, 2021 data).
What does RAII mean?
noun
- 1
Initialism of Resource Acquisition Is Initialization, a popular design pattern in object-oriented programming that ties resources to the lifespan of associated objects to prevent resource leakage.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is RAII?
RAII appears about once in every 42 million words in written English, the 199,120th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does RAII come from?
Coined by Bjarne Stroustrup.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).