someone who develops (generally inadvertently) a set pattern of doing the same thing(s) during a certain
time period of the
day, week etc.
the opposite of someone who is
spontaneous or has the ability to exhibit spontaneity.
"My
father tended to be a creature of habit, especially during the weekend. For example, every Saturday morning, for as far back as I can remember, he would walk to the corner store, fetch the
paper and read it at the breakfast
table for approximately two hours. And every Sunday afternoon, without fail, he would take a drive out into the country, rain or shine."