A maker’s mark imprinted on a work to show that it is sanctioned by members of a trade union. It is often a tiny elongated rhomboid containing and surrounded by, in minuscule typeface, identifying names and the union’s local chapter number.

union cemeterynoun

A cemetery shared by more than one church congregation or municipality, usually to lighten the financial burden (cost per congregation or municipality) and usually nondenominational/nonsectarian.

Union Cityname

A city in Alameda County, California, United States.

Union Islandname

An island of Saint Vincent and the Grenadines.

Union Jacknoun

The flag of the United Kingdom, consisting of the flags of England (St. George's Cross), Scotland (St. Andrew's Cross), and Ireland (St. Patrick's Cross, now only used in Northern Ireland) combined.

Union of Soviet Socialist Republicsname

A former transcontinental country in Europe and Asia (1922–1991), now split into Russia and 14 other countries; short form Soviet Union; abbreviation USSR.

Union Oilnoun

A lowball hand with a seven and a six as the two highest cards

Union Roadname

A community and rural municipality of Queens County, Prince Edward Island, Canada.

Union Squarename

An area of San Francisco.

union stationnoun

A railroad station shared by more than one railroad company, usually to spread the costs and ease the logistics of serving a particular town by rail.

unionaladj

Pertaining to a union.

unionallnoun

A one-piece garment that is used as work clothes or as a uniform.

unionbusternoun

A person employed to prevent the formation or expansion of trade unions.

unionbustingnoun

Efforts to prevent the formation or expansion of trade unions.

unioneernoun

A trade unionist.

unionicadj

Not ionic.

unionidnoun

Any member of the family Unionidae of bivalves.

unioniformadj

Resembling or characteristic of a unionid.

unionisationnoun

Alternative spelling of unionization.

unionisedverb

simple past and past participle of unionise

unionisernoun

Alternative form of unionizer.

unionismnoun

The support of advocacy of a union, especially of a trade union.

unionistadj

Of or pertaining to unionism (in any sense).

unionisticadj

Of or pertaining to union or unionists, such as trade unions.

unionitenoun

A form of zoisite

unionizationnoun

The act of forming a labor union.

unionizeverb

To organize workers into a union.

unionizedverb

simple past and past participle of unionize

unionizernoun

One who unionizes.

unionlessadj

Without an industrial union.

unionoidnoun

Any member of the family Unionidae or its order Unionida of freshwater mussels.

Uniontownname

A number of places in the United States:

unionwideadj

Throughout a union.

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 250. 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.