regular

modif.

1. In accordance with custom

   customary, usual, routine; see conventional 1, 2, natural 2, normal 1.

2. In accordance with accepted rules

   proper, established, legitimate, lawful; see conventional 1, 2, legal 1.

3. In accordance with an observable pattern

   orderly, methodical, routine, symmetrical, precise, exact, systematic, punctual, steady, uniform, even, arranged, organized, patterned, constant, congruous, consonant, accordant, consistent, invariable, formal, regulated, rational, rhythmic, periodic, measured, classified, in order, unconfused, harmonious, normal, natural, cyclic, cyclical, successive, momentary, alternating, probable, recurrent, habitual, general, usual, expected, frequent, serial, automatic, mechanical, pulsating, rotational, alternate, hourly, daily, monthly, weekly, annual, seasonal, yearly, quarterly, semiannual, diurnal, quotidian, tertian, quartan, hebdomadal, menstrual, anticipated, looked for, hoped for, counted on, relied on, fixed, generally occurring, in the natural course of events, regular as clockwork*.

   Antonyms irregular*, sporadic*, erratic. See syn. study at normal, steady.normal, steady.