Ef
adj, conj, name, noun ·Rare ·Advanced level
Definitions
- 1 The name of the Latin script letter F/f.
"I have drunk en-ee-cee-tee-ay-ar from the ef-ell-oh-doubleyou-ee-ar-ess in his gee-ay-ar-dee-ee-en many a time."
- 2 Initialism of ejection fraction. abbreviation, alt-of, initialism
- 3 Initialism of electric field. abbreviation, alt-of, initialism
"Under certain conditions, the localized EF near an energized transmission line conductor can produce small electric discharges, ionizing nearby air. […] Modern “bipolar” cardiac devices are much less susceptible to interactions with EFs. Manufacturers of pacemakers and other IMDs have indicated that EFs below 6 kV/m are unlikely to cause interactions affecting the operation of most of their devices."
- 1 Initialism of extremely fine or extra fine; also XF. abbreviation, alt-of, initialism, not-comparable
- 1 Pronunciation spelling of if, representing dialectal English. alt-of, nonstandard, pronunciation-spelling
"Captain Tom would have hired him to hunt down his own child, ef Rosebud hadn’t interfered."
- 1 Initialism of Entity Framework, an open-source ORM framework. abbreviation, alt-of, initialism
- 2 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of Enhanced Fujita, a rating on the Enhanced Fujita scale used to indicate the intensity of a tornado; it has superseded the Fujita scale. Canada, US
- 3 Initialism of Extraordinary Form. abbreviation, alt-of, initialism
Example
More examples"“Now ef ye alls don’t quit fussin’, I’ll set the boogers arter ye ter-night,” which was a dire and telling threat, for, to the mountain children, “boogers” meant ghosts, witches, hobgoblins, thieves, or any other terrible, mysterious creature of the night."
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.