Webster's Revised Unabridged Dictionary · 1913

Customary

Customary (kus"tum*a*ry) , adjective

[CF. Old French coustumier, French coutumier. See Custom, and compare Customer.]

1.
Agreeing with, or established by, custom; established by common usage; conventional; habitual.
Even now I met him With customary compliment. — Shakespeare
A formal customary attendance upon the offices. — South
2.
(Law) Holding or held by custom; as, customary tenants; customary service or estate.

Customary , noun

[Old French coustumier, French coutumier.]

A book containing laws and usages, or customs; as, the Customary of the Normans. — Cowell