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up-front frank; forthcoming. [4 definitions]
upgrade an upward slope or incline. [4 definitions]
upgradeable combined form of upgrade.
upheaval an act, instance, or condition of being raised or heaved upward, as a section of the earth's crust. [2 definitions]
upheave to lift or raise forcefully; heave upwards.
uphill on an upward slope, or in an upward direction. [5 definitions]
uphold to support or affirm, esp. in the face of a challenge. [2 definitions]
upholster to provide (furniture) with springs, padding, and a covering.
upholstery materials such as springs, padding, and fabric that are used to cover couches, chairs, or the like. [2 definitions]
UPI abbreviation of "United Press International."
up in arms stirred to fight; indignant.
up in the air undecided, unsettled, or uncertain.
upkeep the maintenance required to keep something or someone in good condition. [2 definitions]
upland the elevated or higher parts of land in a region. [2 definitions]
uplift to improve the spiritual, moral, or social condition or mood of. [3 definitions]
upload to transfer (data, files, or programs) from one's own computer to another, often larger, computer or a network. [2 definitions]
upmost (informal) uppermost.
upon on. [4 definitions]
up one's sleeve held secretly or in reserve.
upper higher in place, rank, position, or level. [6 definitions]
Upper Carboniferous see Pennsylvanian.