slope

Definitions

General English

Aviation

  • noun a state in which one end of an aircraft is higher than the other

Construction

  • The angle of repose at which a soil material will stand without moving.
  • The slope of a roof, ramp, or paving expressed as one unit of rise to one unit of run. See also pitch, incline, and grain slope.

Electronics

  • A line, plane, surface, orientation, or direction which is inclined. Also, to move in such a manner.
  • A deviation from a horizontal line, plane, surface, orientation, or direction. Also, the extent of such a deviation.
  • A measure of the change in a variable in the vertical axis divided by a change in the value of a variable measured along the horizontal axis. For example, a horizontal line has a slope of zero.
  • A measure of the change in a variable relative to a change in the value of another variable.
  • In a transmission line, the rate of change of attenuation relative to frequency. Expressed, for instance, in dB per Hz.
  • Within a straight or nearly straight portion of a characteristic curve, the deviation from such a graphed line.

Military

  • noun an area of ground, in which one part is higher than the other
  • noun the side of a hill
  • verb to form a slope

Slang

  • noun an Oriental person, especially a Vietnamese. This derogatory term, deriving from ‘slope-eyed’, moved from the US to Australia in the 1970s.

Origin & History of “slope”

The noun slope did not emerge until the 17th century. Originally it was an adverb, short for the now defunct aslope. This is generally supposed to go back to an unrecorded Old English *āslopean, an adverbial use of the past participle of āslūpan ‘slip away’. such a scenario would appear to fit in well with the colloquial slope off ‘leave’, but in fact this usage did not emerge until the early 19th century, in America.
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