1. ef - Noun
2. ef - Adjective
3. ef - Conjunction
4. Ef - Proper noun
ef (plural efs)
The name of the Latin-script letter F.
ef
(nonstandard) Pronunciation spelling of if, representing dialectal English.
EF (plural EFs)
(medicine, cardiology) Initialism of ejection fraction.
(computing, Microsoft) Initialism of Entity Framework, an open-source ORM framework.
(Canada, US, meteorology) Followed by a number from 0 to 5: initialism of Enhanced Fujita, a rating on the Enhanced Fujita scale used to indicate the intensity of a tornado. It has superseded the Fujita scale.
(Roman Catholicism) Initialism of Extraordinary Form.
EF (not comparable)
(philately) Initialism of extremely fine or extra fine; also XF.