11-letter words starting with u
- unwillingly — not willing; reluctant; loath; averse: an unwilling partner in the crime.
- unwinkingly — in an unwinking manner
- unwithering — to shrivel; fade; decay: The grapes had withered on the vine.
- unwithstood — not opposed or resisted; not withstood
- unwitnessed — lacking the signature of a witness: an unwitnessed legal document.
- unwittingly — inadvertent; unintentional; accidental: His insult, though unwitting, pained her.
- unwoundable — incapable of being wounded, injured, or harmed
- up and down — moving in or related to a direction that is up or is regarded as up: the up elevator; the up train traveling north; the up platform of a railroad station.
- up for sale — If a property or company is up for sale, its owner is trying to sell it.
- up the ante — to increase the costs, risks, or considerations involved in taking an action or reaching a conclusion
- up the duff — pregnant
- up the pole — slightly mad
- up the wall — any of various permanent upright constructions having a length much greater than the thickness and presenting a continuous surface except where pierced by doors, windows, etc.: used for shelter, protection, or privacy, or to subdivide interior space, to support floors, roofs, or the like, to retain earth, to fence in an area, etc.
- up to putty — worthless or useless
- up to snuff — to draw in through the nose by inhaling.
- up to speed — rapidity in moving, going, traveling, proceeding, or performing; swiftness; celerity: the speed of light; the speed of sound.
- up-and-down — moving alternately up and down: the up-and-down swing of levers; an up-and-down tune.
- up-and-over — (of a door, etc) opened by being lifted and moved into a horizontal position
- up-gathered — to gather up or together: to upgather information.
- up-helly-aa — a midwinter festival held in January in Shetland; originally a fire festival, but now a celebration of Shetland's Norse heritage, involving the ceremonial burning of a newly built Viking ship
- upgradation — the process, state, or act of upgrading
- upgradeable — an incline going up in the direction of movement.
- upholstered — to provide (chairs, sofas, etc.) with coverings, cushions, stuffing, springs, etc.
- upholsterer — a person whose business it is to upholster furniture and, sometimes, to furnish and put in place hangings, curtains, carpets, etc.
- upholstress — a female upholsterer
- upliftingly — in an uplifting manner
- upper bound — an element greater than or equal to all the elements in a given set: 3 and 4 are upper bounds of the set consisting of 1, 2, and 3. Compare bound3 (def 4), greatest lower bound, least upper bound, lower bound.
- upper class — a class of people above the middle class, having the highest social rank or standing based on wealth, family connections, and the like.
- upper crust — the topmost layer of crust, as of a pie.
- upper darby — a town in SE Pennsylvania, near Philadelphia.
- upper egypt — Arab Republic of. a republic in NE Africa. 386,198 sq. mi. (1,000,252 sq. km). Capital: Cairo. Formerly (1958–71) United Arab Republic.
- upper floor — An upper floor in a hotel is on a level above the first floor.
- upper house — one of two branches of a legislature generally smaller and less representative than the lower branch, as the Senate of the U.S. Congress.
- upper sixth — (in England, Wales and Northern Ireland) the final year of sixth form
- upper volta — former name of Burkina Faso.
- uprightness — erect or vertical, as in position or posture.
- upset price — the lowest price at which a person is permitted to bid for something being sold at auction.
- upside down — with the upper part undermost.
- upstretched — stretched upward, as the arms.
- uptightness — the quality or state of being uptight
- upvaluation — the state or process of being or becoming higher in value
- ural-altaic — of or relating to the Ural Mountains, on the border between the Russian Federation in Europe and Siberia, and the Altai Mountains, in S Siberia and NW Mongolia, or the country or peoples around them.
- uranium 235 — the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. When bombarded with neutrons it undergoes fission with the release of energy.
- uranium 238 — the radioactive uranium isotope having a mass number 238, comprising 99.28 percent of natural uranium: used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239.
- uranium 239 — the uranium isotope with a mass number 239. It is artificially produced by the neutron bombardment of uranium 238.
- uranium-235 — a uranium radioisotope that is used in nuclear fission
- uranography — the branch of astronomy concerned with the description and mapping of the heavens, and especially of the fixed stars.
- uranoplasty — a surgical operation to correct a defect of the palate or roof of the mouth
- uranoscopid — any fish of the family Uranoscopidae, comprising the stargazers.
- urban blues — an extrovert and rhythmic style of blues, usually accompanied by a band