English Words: U
23,789 words · Page 2 of 476
Initialism of uncrewed aerial system, unmanned aerial system, uncrewed aircraft system, or unmanned aircraft system: an aircraft with no onboard pilot, and sometimes completely unpiloted, as well as the other components of the system, including automated guidance and telemetry, a remote operator if any, etc.
The daughter of Scáthach and later the lover of Cúchulainn (after a duel with Cochar Crufe).
Initialism of unmanned aerial vehicle or uncrewed aerial vehicle: an aircraft with no onboard pilot, and sometimes completely unpiloted, that is capable of controlled, sustained, level flight.
A former French colony in central Africa, a part of French Equatorial Africa, established in 1903 and made independent as the Central African Republic in 1960.
Of or pertaining to a language family centred on the Central African Republic, including Sango.
A supposed former custom of Japan, whereby an infirm or elderly relative was left in some desolate place to die.
In urban law and planning, the challenges facing municipalities when regulating major multinational transport network companies (TNCs).
A genre of alternate universe fan fiction which features archetypes of canon characters (including ancestors, descendants, and reincarnations) living in a different time, setting, or reality than that found in canon.
The transformation of an existing industry or economy with the help of computing platforms, especially mobile applications, and temporary employment schemes.
To introduce a platform to an existing market or industry that provides direct transactions between sellers and buyers, often using mobile technology.
Spelling & Dictionary Insight
The English alphabetical index for the letter U contains 23,789 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 476 pages, and you are currently viewing page 2. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "U" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.