shaped like a rectangle having or relating to right angles mutually perpendicular: rectangular coordinates having a base or section shaped like a rectangle
WordReference Random House Unabridged Dictionary of American English © 2026
rec•tan•gu•lar
(rek tang′gyə lər),USA pronunciation adj.
rec•tan•gu•lar•i•ty
(rek tang′gyə lar′i tē),USA pronunciation rec•tan′gu•lar•ness, n.
rec•tan′gu•lar•ly, adv.
- Mathematicsshaped like a rectangle.
- Mathematicshaving the base or section in the form of a rectangle:a rectangular pyramid.
- Mathematicshaving one or more right angles.
- Mathematicsforming a right angle.
- Medieval Latin rēctangul(um) rectangle + -ar1
- 1615–25;
Collins Concise English Dictionary © HarperCollins Publishers::
rec•tan•gle /ˈrɛkˌtæŋgəl/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- Mathematicsa four-sided figure with parallel sides, having four right angles:Every square is a rectangle, but not every rectangle is a square.
rec•tan•gle
(rek′tang′gəl),USA pronunciation n.
- Mathematicsa parallelogram having four right angles.
- Medieval Latin rēctangulum, Late Latin rēctiangulum right-angled triangle (noun, nominal use of neuter of rēctiangulus having a right angle), equivalent. to rēcti- recti- + angulum angle1
- 1565–75
'rectangular' also found in these entries (note: many are not synonyms or translations):
Cape Cod
- Chiclets
- Darwin tulip
- Mercator projection
- Möbius strip
- agnolotti
- amice
- arba kanfoth
- architrave
- attaché case
- badminton
- baguette
- bar
- barrow
- basilica
- basketball
- billet
- billiards
- birectangular
- bit map
- blanket
- blanket chest
- block
- bloom
- board
- bootheel
- box
- box beam
- box bolt
- box column
- box girder
- box stretcher
- breastplate
- brick
- briefcase
- broken-check
- buckle
- butler's tray
- card
- carriage clock
- chase
- cleat
- corner
- crease
- crowd
- crystal
- cuboid
- cut nail
- dado
- de Stijl