Custom

From the Encyclopedia Galactica:

Custom ‎(plural customs)
 * 1) Frequent repetition of the same behavior; way of behavior common to many; ordinary manner; habitual practice; usage; method of doing, living or behaving.
 * 2) Habitual buying of goods; practice of frequenting, as a shop, manufactory, etc., for making purchases or giving orders; business support.
 * 3) (law) Long-established practice, considered as unwritten law, and resting for authority on long consent; usage.
 * 4) (obsolete) Familiar acquaintance; familiarity.
 * 5) A customary toll, tax, or tribute.
 * 6) Created under particular specifications, specially to fit one's needs: specialized, unique, custom-made.