perpendicular
Meeting at ninety
Perpendicular describes lines or surfaces meeting at a right angle—ninety degrees.
A flagpole stands perpendicular to the ground.
In geometry, perpendicular lines intersect to form four equal angles.
The word extends to anything steeply vertical: The cliff face was nearly perpendicular.
As a noun, it names a line at right angles to another: Drop a perpendicular from the apex to the base.
Vertical or morally sound
- erectVertical in position
- standingPosition, physical or social
- verticalAt right angles groundward
- plumbExactly vertical or true
steep · sheer · precipitous · wall · drop · rise · towering · straight-up
Exactly vertical or true
- squareRhombus with right angles
- levelHorizontal or uniform position
- protractorAngle-measuring instrument
- T-squareRight-angled drawing guide
plumb-bob · straightedge · drafting · surveying · true · aligned · calibrated
Ninety-degree intersection
- orthogonalAt right angles
- normalConforming to standard
- EuclideanFlat-space geometry type
- CartesianOf x-y coordinate geometry
coordinate · axes · plane · bisector · theorem · hypotenuse · tangent · transversal
Point where paths intersect
- crossroadsMeeting of routes
- junctionPoint where things meet
- T-junctionPerpendicular road meeting
- cornerMeeting point of edges
upright
Vertical or morally sound
plumb · steep · sheer · precipitous · wall · drop · rise · towering · straight-up
plumb
Exactly vertical or true
- squareRhombus with right angles
- levelHorizontal or uniform position
- protractorAngle-measuring instrument
T-square · plumb-bob · straightedge · drafting · surveying · true · aligned · calibrated
right-angle
Ninety-degree intersection
- orthogonalAt right angles
- normalConforming to standard
- EuclideanFlat-space geometry type
Cartesian · coordinate · axes · plane · bisector · theorem · hypotenuse · tangent · transversal · altitude
crossing
Point where paths intersect
- crossroadsMeeting of routes
- junctionPoint where things meet
- T-junctionPerpendicular road meeting
corner · transverse · athwart · crosswise
buttress
Architectural wall reinforcement
- pierWaterfront landing structure
- load-bearingSustaining structural mass
- structuralRelating to building framework
brace · support · column · pillar · post · beam · medieval · tracery · mullion · vault
- linesstraight line, line, dotted line, dashed line, solid line
- long wordssupercalifragilisticexpialidocious, antidisestablishmentarianism, incomprehensibilities, counterrevolutionary, electroencephalograph
- geometryangles, circles, angle, shapes, lines
- math conceptsangle, numbers, algebra, circle, equations
- directionsnorth, south, east, west, left
- spatial adjectivesupper, lower, inner, outer, front
- perpendicular styleApproach featuring upright elements
- perpendicular parkingSpaces at ninety degrees