four-sided shape
nounUK /ˌfɔːˈsaɪdɪd ʃeɪp/
US /ˌfɔːrˈsaɪdɪd ʃeɪp/
A four-sided shape is a flat shape with four straight sides.
A square is a four-sided shape with all sides the same length.
OTHER MEANINGS
2. In geometry, any polygon with exactly four edges and four vertices.
The teacher asked the class to name every four-sided shape on the board.
3. A shape with four sides that may not all be equal or have right angles.
A kite is a four-sided shape with two pairs of equal sides.
4. A general term used in everyday speech for squares, rectangles, and similar figures.
He drew a four-sided shape to stand for the house in his picture.