Main entry: round, circular
Definition: having a circular shape
Antonyms: square
Definition: having four equal sides and four right angles or forming a right angle
Antonyms: nonspherical
Definition: not spherical
Main entry: pear-shaped, orotund, rotund, round
Definition: (of sounds) full and rich
Usage: orotund tones; the rotund and reverberating phrase; pear-shaped vowels
Antonyms: empty
Definition: holding or containing nothing
Antonyms: thin
Definition: (of sound) lacking resonance or volume
Main entry: round
Definition: (mathematics) expressed to the nearest integer, ten, hundred, or thousand
Usage: in round numbers
Antonyms: exact
Definition: marked by strict and particular and complete accordance with fact