Adjective

(en adjective)

Having the form of a line; straight.

Of or relating to lines.

Made in a step-by-step, logical manner.

(botany, of leaves) Long and narrow, with nearly parallel sides.

(mathematics) Of or relating to a class of polynomial of the form $y\; =\; ax\; +\; b$.

(physics) A type of length measurement involving only one spatial dimension (as opposed to area or volume).

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?