Webster's Revised Unabridged Dictionary · 1913

Regular

Regular (-l?r) , adjective

[Latin regularis, from regula a rule, from regere to guide, to rule: compare French régulier. See Rule.]

1.
Conformed to a rule; agreeable to an established rule, law, principle, or type, or to established customary forms; normal; symmetrical; as, a regular verse in poetry; a regular piece of music; a regular verb; regular practice of law or medicine; a regular building.
2.
Governed by rule or rules; steady or uniform in course, practice, or occurence; not subject to unexplained or irrational variation; returning at stated intervals; steadily pursued; orderlly; methodical; as, the regular succession of day and night; regular habits.
3.
Constituted, selected, or conducted in conformity with established usages, rules, or discipline; duly authorized; permanently organized; as, a regular meeting; a regular physican; a regular nomination; regular troops.
4.
Belonging to a monastic order or community; as, regular clergy, in distinction dfrom the secular clergy.
5.
Thorough; complete; unmitigated; as, a regular humbug. [Colloquial]
6.
(Botany & Zoology) Having all the parts of the same kind alike in size and shape; as, a regular flower; a regular sea urchin.
7.
(Crystallography) Same as Isometric.
Collocations (4)
Regular polygon (Geometry) , a plane polygon which is both equilateral and equiangular.
Regular polyhedron (Geometry) , a polyhedron whose faces are equal regular polygons. There are five regular polyhedrons, -- the tetrahedron, the hexahedron, or cube, the octahedron, the dodecahedron, and the icosahedron.
Regular sales (Stock Exchange) , sales of stock deliverable on the day after the transaction.
Regular troops , troops of a standing or permanent army; -- opposed to militia.

Regular (reg"u*lẽr) , noun

[Late Latin regularis: compare French régulier. See Regular, a.]

1.
(Roman Catholic Church) A member of any religious order or community who has taken the vows of poverty, chastity, and obedience, and who has been solemnly recognized by the church. — Bp. Fitzpatrick
2.
(Military) A soldier belonging to a permanent or standing army; -- chiefly used in the plural.