1. (noun)perpendicular a straight line at right angles to another line Synonyms: perpendicularstyle, plumbline Antonyms: nonconvergent, diagonal, gradual, catty-corner, sideways, crabwise, oblique-angled, collateral, kitty-corner, catty-cornered, antiparallel, catercorner, nonparallel, catacorner, cater-cornered, kitty-cornered, parallel, oblique, bias, nonintersecting, cata-cornered
2. (noun)perpendicular, perpendicular style, English-Gothic, English-Gothic architecture a Gothic style in 14th and 15th century England; characterized by vertical lines and a four-centered (Tudor) arch and fan vaulting Synonyms: perpendicularstyle, plumbline, perpendicular Antonyms: oblique, collateral, nonparallel, nonconvergent, catty-corner, bias, gradual, catacorner, oblique-angled, antiparallel, crabwise, kitty-corner, cata-cornered, nonintersecting, catercorner, kitty-cornered, diagonal, sideways, catty-cornered, parallel, cater-cornered
3. (noun)plumb line, perpendicular a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point Synonyms: perpendicularstyle, plumbline, perpendicular Antonyms: sideways, cater-cornered, catty-corner, oblique, parallel, catacorner, nonintersecting, catercorner, antiparallel, oblique-angled, crabwise, collateral, catty-cornered, nonparallel, bias, cata-cornered, kitty-corner, kitty-cornered, diagonal, gradual, nonconvergent