name · noun · verb · 7 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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ĕf
/ɛf/
rhymes with -ɛf
homophone: ef
1
name
Meaning 1
Initialism of Electronic Frontier Foundation.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
Alternative spelling of ef; the name of the Latin script letter F/f.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of, alternative
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
Alternative letter-case form of eff.
Definition source: English Wiktionary via Wiktextract
Usage: alt-of
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
verb
Meaning 5
Synonym of fuck.
Definition source: English Wiktionary via Wiktextract
Usage: euphemistic, slang
Examples
Eff off!
And he kept saying, "Effing this, effing that."
Meaning relationships
Synonyms: feck, frak, frig, fork, funk, fuck
Antonyms: none provided
6
verb
Meaning 6
To put into words; to express.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
7
verb
Meaning 7
have sexual intercourse with
Definition source: Princeton WordNet 3.0
Examples
This student sleeps with everyone in her dorm
Adam knew Eve
Were you ever intimate with this man?
Meaning relationships
Synonyms: sleep together, roll in the hay, love, make out, make love, sleep with, get laid, have sex, know, do it, be intimate, have intercourse, have it away, have it off, screw, fuck, jazz, hump, lie with, bed, have a go at it, bang, get it on, bonk
Antonyms: none provided
Broader terms: copulate, mate, pair, couple
Narrower terms: take, have, fornicate
History
Etymology
From the name of the letter f (see etymology 1), the initial letter of fuck. Compare pee.
Back-formation from ineffable, ultimately from Latin effor (“utter”).