Adjective

(en adjective)

Of or relating to a circle.

In the shape of, or moving in a circle.

* , chapter=5

, title= The Mirror and the Lamp , passage=Here, in the transept and choir, where the service was being held, one was conscious every moment of an increasing brightness; colours glowing vividly beneath the circular chandeliers, and the rows of small lights on the choristers' desks flashed and sparkled in front of the boys' faces, deep linen collars, and red neckbands.}}

Circuitous or roundabout.

Referring back to itself, so as to prevent computation or comprehension; infinitely recursive.

circular reasoning

Your dictionary defines "brave" as "courageous", and "courageous" as "brave". That's a circular definition.

a circular formula in a spreadsheet

Distributed to a large number of persons.

* Hallam

a proclamation of Henry III., doubtless circular throughout England

(obsolete) Perfect; complete.

* Massinger

A man so absolute and circular / In all those wished-for rarities that may take / A virgin captive.

(archaic) Adhering to a fixed circle of legends; cyclic; hence, mean; inferior.

* Dennis

Had Virgil been a circular poet, and closely adhered to history, how could the Romans have had Dido?

Adjective

(en adjective)

(label) Shaped like a sphere.

*{{quote-magazine, year=2013, month=September-October, author=(Henry Petroski)

, magazine=(American Scientist), title= The Evolution of Eyeglasses , passage=The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone, essentially what today we might term a frameless magnifying glass or plain glass paperweight.}}

(label) (no comparative or superlative ) Of, or pertaining to, spheres.

(label) Of a coordinate system, specifying the location of a point in a plane by using a radius and two angles.

(label) Of or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set.

*1606 : (William Shakespeare), (King Lear) , Act 1, Scene 2

Knaves, thieves, and treachers by spherical predominance.