What is the meaning of the word "regular"?

Definitions:

(used of the military) belonging to or engaged in by legitimate army forces adjective
- the regular army
a dependable follower, especially in party politics noun
- They were one of the party regulars.
conforming to a standard or pattern adjective
- following the regular procedure of the legislature
in accord with regular practice or procedure adjective
- I took my regular morning walk earlier today.
in accordance with fixed order or procedure or principle adjective
- My regular calls on customers paid off in the end.
not deviating from what is normal adjective
- The went to sleep every night at their regular bedtime.
occurring at fixed intervals adjective
- a regular beat
officially full-time adjective
- regular students
regularly scheduled for fixed times adjective
- at a regular meeting of the PTA
relating to a person who does something regularly adjective
- a regular customer