EF

See also: ef, ef-, and -ef

Translingual

Symbol

EF

1. (metrology) Symbol for exafarad, an SI unit of electrical capacitance equal to 10¹⁸ farads.
2. (climatology) Köppen climate classification for an ice cap climate.
3. (international standards) Indeterminately reserved ISO 3166-1 alpha-2 country code for the Union of Countries under the European Community Patent Convention.

Usage notes

(ISO 3166): This is an indeterminately reserved code, included as part of ISO 3166-1 on the request of the World Intellectual Property Organization due to its former intended use in the WIPO ST.3 standard, and is not endorsed for general use by the ISO.

English

Noun

EF (plural EFs)

1. (medicine, cardiology) Initialism of ejection fraction.

Proper noun

EF

1. (computing, Microsoft) Initialism of Entity Framework, an open-source ORM framework.
2. (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 It has superseded the Fujita scale.
3. (Roman Catholicism) Initialism of Extraordinary Form.

Adjective

EF (not comparable)

1. (philately) Initialism of extremely fine or extra fine; also XF.

Anagrams

• F&E, FE, Fe, f.e.

German

Pronunciation

• IPA^(key): /ˈeːʔɛf/

Noun

EF m (strong, genitive EFs or EF, plural (formal) EF or (colloquial) EFs)

1. (historical, military) one-year volunteer (abbreviation of Einjährig-Freiwilliger)

Usage notes

• The plural often takes no ending in formal standard German. In less formal speech, however, -s is only rarely omitted.

Derived terms

• EFschaft
• EFK