Pronunciation: [ˈɛf] (IPA) 
The spelling of the word "EF" is straightforward as it is pronounced exactly how it is spelled. The IPA phonetic transcription of "EF" is [ɛf]. This represents the sound of the letter "E" followed by the sound of the letter "F". The sound of "E" is an open-mid front unrounded vowel while the sound of "F" is a voiceless labiodental fricative. "EF" is commonly used as an abbreviation for words like "effort" or "effective."
EF is an abbreviation that can have different meanings depending on the context. One common definition is Education First, which refers to an international education company that specializes in language training, educational travel, and cultural exchange programs. EF offers language courses in various countries and provides opportunities for students to study abroad and immerse themselves in a different language and culture.
Additionally, EF can also refer to the term "EF Core," which is an abbreviation for Entity Framework Core. Entity Framework Core is an open-source, cross-platform Object-Relational Mapping (ORM) framework developed by Microsoft. It allows developers to work with databases using .NET and provides an easy way to manage database connections, query data, and perform CRUD (Create, Read, Update, Delete) operations through a high-level API.
In the field of photography, EF stands for Electro-Focus, which is a system used by Canon lenses. EF lenses are designed to work with Canon cameras and feature electronic autofocus capabilities, allowing for quick and precise focusing.
Furthermore, EF can also be an abbreviation for "Exposure Factor" in photography. Exposure factor refers to the numerical ratio of exposure index to the film speed. It is used to calculate the correct exposure settings when shooting under different lighting conditions, to ensure proper exposure of the film or image sensor.
In conclusion, EF has various meanings depending on the context, including Education First, Entity Framework Core, Electro-Focus, and Exposure Factor.
Prefix, another form of ex, which see.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
