Definition of custom:
(n) :
frequent
repetition of the same
act; way of acting common to many;
ordinary manner;
habitual practice;
usage; method of doing or living;
Habitual buying of goods; practice of frequenting, as a shop, manufactory, etc., for making purchases or giving orders; business support
"and teach customs which are not lawful. Acts xvi. 21."
(adj) :
made in a different way from usual, specially to fit one's needs
"my feet are as big as powerboats, so I need custom shoes."
"on a bridge he custometh to fight.
Spenser."