noun · 5 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
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
UK:/ˌjuːɛfˈəʊ/
UK:/ˈjuːfəʊ̯/
US:/ˌjuˌɛfˈoʊ/
US:/ˈjufoʊ̯/
US:/ˈʌfoʊ̯/
US:Recorded audio is listed in the source snapshot.
rhymes with -əʊ
rhymes with -uːfəʊ
/ˈju.foʊ/
CMU ARPABET:Y UW2 EH2 F OW1
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
Initialism of unidentified flying object; (loosely) an alien spacecraft.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: UAP
Antonyms: none provided
2
noun
Meaning 2
An "unfinished object" in knitting or other kinds of craft.
Definition source: English Wiktionary via Wiktextract
Usage: colloquial
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
Initialism of ultrared flattened object.
Definition source: English Wiktionary via Wiktextract
Usage: abbreviation, alt-of, initialism
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
A UFO.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.