Definition of rhombus in US English:



  • 1A parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.

    • ‘The unusual pieces (rhombuses and octahedrons) lend themselves to ‘outside the box‘creativity, while the pieces are easy to handle for even fumble-fingered types.’
    • ‘The panel shapes vary much more, using slanted lines, making the panels rhombuses.’
    • ‘Across the tiled floor they saw nothing but the laughing sun's reflection through colored glass rhombuses.’
    • ‘I picked up an interesting sedimentary rock that was the exact shape of a rhombus.’
    • ‘She was telling us about Washington Square Park, and I said ‘Actually, it's a rhombus!’’
    • ‘In Austria, it is also called ‘Raute’ which means diamond or rhombus.’
    • ‘Close rhombuses represent the rest of the pairwise distance comparisons.’
    • ‘Three pilots made goal around the 120 kilometer rhombus course.’
    • ‘They were a weird rhombus shape, and his irises were a mixture of pinks and creams, which Katelyn really loved.’
    • ‘Through the door one could see a tremendous amount of sunlight that came into the room and landed with a segmented rhombus shape on loveseat next to a chest full of clothes.’
    • ‘If I had an ounce of motivation and wasn't too insecure to kickbox in my living room with the neighbors watching, I could see this program whipping me into a shape other than a rhombus.’
    • ‘A week ago, Brian Woolnough and his pals forbade him constructing a rhombus out of his midfield troops.’
    • ‘With the help of square, rhombus, rectangle, parallelogram, trapezium, equilateral, isosceles, diamond and kite shapes the direct and indirect approaches to teach the Pythagoras Theorem and other mathematical concepts is possible.’
    • ‘A sleek and shiny ship shaped like a rhombus with concave edges came spiraling in, then extended a large tripod and landed on the flat roof of one of the buildings.’
    • ‘The formula for computing the volume of a rhombus, that's something you forget.’
    • ‘The picture above is made up of two shapes of rhombus or rhombs - that is, ‘pushed over squares’ where each shape has all sides of the same length.’
    • ‘On more than one occasion during the qualifiers Eriksson's jewel looked more like a rhombus that had slewed drunkenly.’
    • ‘Within a semester, he had invented something new - a beautiful game played on a rhombus with Go stones - that instantly established his reputation as a pure mathematician.’
    • ‘Figure 6 shows an equilateral triangle and a rhombus that circumscribe the same unit circle.’
    • ‘It was predominantly wooden floorboards and white walls, very open and wide spaces, and the walls downstairs, by the front hall where we stood, wore a wall-paper of some repetitive silver and black rhombus design.’
    diamond shape, diamond
    View synonyms
    1. 1.1 Any parallelogram with equal sides, including a square.
      • ‘‘Well, there are four characters, so it's a bit of a love rhombus,’ he said.’
      • ‘Since the area of a rhombus is half the product of the diagonals, and the diagonal of the smaller square is 10 inches, and a square is a rhombus…’


Mid 16th century: via Latin from Greek rhombos.