Basic Nouns - Shapes

Here you will learn some English nouns related to shapes such as "oval", "sphere", and "trapezoid".

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circle

[noun]

a completely round, plain shape

Ex: The sun was a bright orange circle in the sky during the sunset .

square

[noun]

a shape with four equal straight sides and four right angles, each measuring 90°

Ex: The tablecloth on the dining table had a beautiful square pattern.

triangle

[noun]

(geometry) a flat shape consisting of three straight sides and three angles

Ex: She folded the paper into a triangle for her origami project .

rectangle

[noun]

(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

Ex: The artist used rectangles in her painting to create a sense of balance .

oval

[noun]

a shape that is wide in the middle and narrow at both ends

Ex: In geometry , an oval is often described as an ellipse with varying lengths .

diamond

[noun]

a shape with four equal, sloping straight sides, forming a point at the top and another at the bottom

Ex: The playing card had a diamond suit , indicating a red card .

star

[noun]

a shape with five or more points, representing a star in the sky

Ex: The top of the Christmas tree was adorned with a sparkling star.

sphere

[noun]

(geometry) a round object that every point on its surface has the same distance from its center

Ex: Spheres are often used in design for their smooth and harmonious appearance .

cube

[noun]

a figure, either hollow or solid, with six equal square sides

Ex: The ice in the cooler was formed into perfect cubes.

cylinder

[noun]

(geometry) a solid or hollow shape with two circular bases at each end and straight parallel sides

Ex: The ancient columns were made in the shape of massive stone cylinders, supporting the grand structure .

cone

[noun]

(geometry) a three dimensional shape with a circular base that rises to a single point

Ex: The chef stacked three ice cream scoops in a waffle cone for the perfect summer treat .

pyramid

[noun]

a solid object with a square base and four triangular sides joined to a point on the top

Ex: The pyramid's base was a square , creating a classic geometric form .

cuboid

[noun]

a three-dimensional geometric shape with six rectangular faces, resembling a box or a rectangular prism

hemisphere

[noun]

either half of a sphere

Ex: The dome 's structure resembled a hemisphere, providing a spacious and airy interior .

prism

[noun]

(geometry) a solid figure with flat sides and two parallel ends of the same size and shape

parallelogram

[noun]

(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other

trapezoid

[noun]

(geometry) a flat shape with four flat sides, two of which are parallel

crescent

[noun]

a curved shape with narrow points at the ends that appears wider in the middle, like the shape of the moon in its first and last quarters

Ex: The crescent of the new moon was barely visible against the twilight sky .

cross

[noun]

a mark or an object formed by two short lines or pieces crossing each other

Ex: Please mark the box with a cross to indicate your choice .

spiral

[noun]

(geometry) a curved shape or design that gradually winds around a center or axis

Ex: The gymnast executed a flawless series of spins and jumps , creating an impressive aerial spiral.

kite

[noun]

a four-sided shape with two pairs of equal-length adjacent sides

right triangle

[noun]

a flat geometric shape consisting of three straight sides and one right angle

lozenge

[noun]

(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°

spheroid

[noun]

(geometry) a round 3D shape like a ball that is slightly flattened at the top and bottom points

Ex: Molten glass is spun at high speeds to form finely detailed scientific spheroids with uses as laboratory vessels or decorative art pieces .

semicircle

[noun]

any half of a circle

Ex: The audience formed a semicircle around the street performer .

pentagon

[noun]

a geometric shape with five angles and five straight sides

Ex: She drew a pentagon on the chalkboard to illustrate its shape to the students .

hexagon

[noun]

(geometry) a closed shape with six straight sides and six angles

Ex: In geometry class , students learned how to calculate the area of a hexagon.

heptagon

[noun]

a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles

Ex: One version of the game featured a board laid out in a grid of non-uniform heptagons instead of the usual squares .

octagon

[noun]

(geometry) a polygon consisting of eight straight sides and eight angles

Ex: The child 's drawing featured a perfectly symmetrical octagon.

nonagon

[noun]

(geometry) a flat shape consisting of nine straight sides and nine angles

decagon

[noun]

(geometry) a flat polygon with ten straight sides and ten angles

Ex: The children were challenged to draw a perfect decagon during their geometry class .

pentagram

[noun]

a five-pointed star

Ex: She drew a pentagram on the front of her notebook .

hexagram

[noun]

(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon

zigzag

[noun]

(geometry) a shape that consists of a line alternating its direction to left and right

hendecagon

[noun]

(geometry) a flat figure consisting of eleven straight sides and eleven angles

dodecagon

[noun]

(geometry) a flat figure that consists of twelve sides and twelve angles

tridecagon

[noun]

a polygon with thirteen sides and thirteen angles

oblong

[noun]

a rectangular figure that has unequal adjacent sides with arched angles

Ex: The garden featured an oblong pond with curved corners, creating a peaceful and inviting atmosphere.

torus

[noun]

a solid shape resembling a donut or ring, made by spinning a circle around a line that does not cut through the circle

Ex: The large sculpture in the park resembled a torus, captivating the attention of passersby .

curve

[noun]

a line or shape that is not straight and bends gradually

Ex: The artist used a brush to create soft curves in her painting .

parallel

[noun]

a pair of geometric figures, such as lines or planes, that do not meet or intersect, no matter how far they are extended

Ex: The design features two long parallels that run alongside each other .

ellipse

[noun]

(geometry) a closed plane curve that has two focal points

Basic Nouns

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Basic Nouns - Shapes