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;
'rectangularity' also found in these entries (note: many are not synonyms or translations):