English Words: U
23,789 words · Page 254 of 476
The smallest repeating structure (parallelepiped) of atoms within a crystal, from which the structure of the complete crystal can be inferred.
the interval [0,1], that is the set of all real numbers x such that zero is less than or equal to x and x is less than or equal to one
A number of items packaged together, typically placed on a pallet for ease of handling and transport.
The price of a standard amount of a good, as of weight or volume. (For example, if the price of a package of biscuits is 100 pesos and the package's net weight is 250 grams, then the biscuits' unit price per kilo is 400 pesos.)
(of an algebra) containing a multiplicative identity element (or unit), i.e. an element 1 with the property 1x=x1=x for all elements x of the algebra.
Alternative letter-case form of unitarian: any Christian who denies the doctrine of the Trinity.
The belief in a single God, not divided into any aspects, particularly when presented as a contrast to Christian trinitarianism.
In local government, a single-tier authority which replaces a two-tier structure. For example, in England, county councils are abolished and their responsibilities are transferred to boroughs and local government districts (but this only applies to some counties, not all). In some cases complete counties, such as Cornwall and Northumberland, are now unitary authorities without any subdivision into local government districts.
For given n, the group of n×n unitary matrices, with the group operation of matrix multiplication.
According to 19th-century German psychiatry, a single underlying disease process of which all psychoses were surface variations.
A country in West Asia in the Middle East. Capital: Abu Dhabi. Largest city: Dubai.
A county in the far east of Ontario, Canada. County seat: L'Orignal.
A kingdom and country in Northern Europe, comprising the four countries of England, Scotland and Wales on the island of Great Britain, and Northern Ireland on the northeastern portion of the island of Ireland since 1922.
Official name of the United Kingdom: a country in Northern Europe.
A common title used by an individual intermicronational organisation; or, more strictly, an intermicronational organisation founded in emulation of the United Nations.
An international coalition, founded in 1945 and headquartered in New York City, that aims to promote global co-operation and maintain international order.
One of the six principal organs of the United Nations and the only one in which all member nations have equal representation.
The United Provinces of the Netherlands, the Republic of the Seven United Netherlands, or the Dutch Republic, a confederation that existed from 1579 until the Batavian Revolution in 1795; a predecessor state of the present-day Netherlands.
A country in North America, also including Hawaii in Oceania; in full, United States of America.
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 254. 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.