per·pen·dic·u·lar
ˌpər-pən-ˈdi-kyə-lər
1
a
: standing at right angles to the plane of the horizon : exactly upright
b
: being at right angles to a given line or plane
2
: extremely steep : precipitous
3
often capitalized
: of or relating to a medieval English Gothic style of architecture in which vertical lines predominate
4
: relating to, uniting, or consisting of individuals of dissimilar type or on different levels
: a line at right angles to a line or plane (as of the horizon)
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Merriam-Webster unabridged
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