Definition of "customary"

When two people met for the first time in Diaspar—or even for the hundredth—it was customary to spend an hour or so in an exchange or courtesies before getting down to business, if any.

1956, Arthur C. Clarke, The City and the Stars, page 39

At half-past nine on this Saturday evening, the parlour of the Salutation Inn, High Holborn, contained most of its customary visitors. […] In former days every tavern of repute kept such a room for its own select circle, a club, or society, of habitués, who met every evening, for a pipe and a cheerful glass.

1892, Walter Besant, chapter III, in The Ivory Gate […], New York, N.Y.: Harper & Brothers, […]

The tenants are chiefly customary and heriotable.

1777, Joseph Nicolson, Richard Burn, The history and antiquities of the counties of Westmorland and Cumberland