Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun quadrilateral

1 sense of quadrilateral

Sense 1
quadrilateral, quadrangle, tetragon -- (a four-sided polygon)
       => polygon, polygonal shape -- (a closed plane figure bounded by straight sides)

Antonyms of adj quadrilateral

1 sense of quadrilateral

Sense 1
quadrilateral, four-sided -- (having four sides)

INDIRECT (VIA multilateral) -> unilateral, one-sided -- (involving only one part or side; "unilateral paralysis"; "a unilateral decision")

Similarity of adj quadrilateral

1 sense of quadrilateral

Sense 1
quadrilateral, four-sided -- (having four sides)
       => multilateral (vs. unilateral), many-sided -- (having many parts or sides)