Adjective

(en adjective)

Precisely agreeing with a standard, a fact, or the truth; perfectly conforming; neither exceeding nor falling short in any respect.

Habitually careful to agree with a standard, a rule, or a promise; accurate; methodical; punctual.

* (John Milton) (1608-1674)

I see thou art exact of taste.

* 1661 , , The Life of the most learned, reverend and pious Dr. H. Hammond

During the whole time of his abode in the university he generally spent thirteen hours of the day in study; by which assiduity besides an exact dispatch of the whole course of philosophy, he read over in a manner all classic authors that are extant

Precisely or definitely conceived or stated; strict.

* (William Shakespeare) (1564-1616)

An exact command, / Larded with many several sorts of reason.

(algebra, of a sequence of groups connected by homomorphisms) Such that the kernel of one homomorphism is the image of the preceding one.

Adjective

(en adjective)

(Christianity) Bound by religious rule; belonging to a monastic or religious order (often as opposed to (secular)).

* 2002 , , The Great Nation , Penguin 2003, page 201:

A quarter of a million strong in 1680, the clergy was only half as large in 1789. The unpopular regular clergy were the worst affected.

Having a constant pattern; showing evenness of form or appearance.

(geometry, of a polygon) Having all sides of the same length, and all (corresponding) angles of the same size

(geometry, of a polyhedron) Whose faces are all congruent regular polygons, equally inclined to each other.

Demonstrating a consistent set of rules; showing order, evenness of operation or occurrence.

* 2011 , (AL Kennedy), The Guardian , 12 Apr 2011:

April may be the cruellest month, but I am planning to render it civilised and to take my antibiotics in a regular manner.

(now, rare) Well-behaved, orderly; restrained (of a lifestyle etc.).

Happening at constant (especially short) intervals.

(chiefly, US) Having the expected characteristics or appearances; normal, ordinary, standard.

*

, title= Mr. Pratt's Patients, chapter=1 , passage=For a spell we done pretty well. Then there came a reg'lar terror of a sou'wester same as you don't get one summer in a thousand, and blowed the shanty flat and ripped about half of the weir poles out of the sand.}}

(chiefly, military) Permanently organised; being part of a set professional body of troops.

Having bowel movements or menstrual periods at constant intervals in the expected way.

(colloquial) Exemplary; excellent example of; utter, downright.

Belonging to a monastic order or community.

regular clergy, in distinction from the secular clergy

(botany, zoology) Having all the parts of the same kind alike in size and shape.

a regular''' flower; a '''regular sea urchin

(crystallography) isometric

(snowboarding) Riding with the left foot forward. BBC Sport, "Sochi 2014: A jargon-busting guide to the halfpipe", 11 February 2014

(analysis, not comparable, of a Borel measure) Such that every set in its domain is both outer regular and inner regular.