regular

Concise Oxford English Dictionary © 2008 Oxford University Press:
regular/ˈreɡjələ(r)/

▶adjective

• 1 arranged in a constant or definite pattern, especially with the same space between individual instances.

• 2 recurring at short uniform intervals: a regular monthly check.

  ■ done or happening frequently.

  ■ doing the same thing often or at uniform intervals: regular worshippers.

• 3 conforming to or governed by an accepted standard of procedure or convention.

  ■ of or belonging to the permanent professional armed forces of a country.

  ■ properly trained or qualified and pursuing a full-time occupation.

  ■ Christian Church subject to or bound by religious rule.

  Contrasted with secular.

• 4 usual or customary.

  ■ chiefly N. Amer. of an ordinary kind.

  ■ N. Amer. not pretentious or arrogant; ordinary and friendly: a regular guy.

  ■ denoting merchandise of average size.

• 5 Grammar (of a word) following the normal pattern of inflection.

• 6 Geometry (of a figure) having all sides and all angles equal.

  ■ (of a solid) bounded by a number of equal figures.

• 7 Botany (of a flower) having radial symmetry.

▶noun a regular customer, member of a team, etc.

■ a regular member of the armed forces.

■ one of the regular Christian clergy.

– derivatives
regularity noun (pl. regularities),
regularization (or regularisation) noun,
regularize (or regularise) verb,
regularly adverb.

– origin ME: from OFr. reguler, from L. regularis, from regula ‘rule’.