The conduit through which coal gas or natural gas is conveyed to users.

(dated) An unmarried noblewoman who was the attendant of a queen or princess / The chief bridesmaid at a wedding

A prescheduled time when a system can be taken off-line for maintenance, if necessary.

Retaining proper functionality over long periods of time with little or no maintenance. / (figuratively) Of a person: self-sufficient and not requiring much attention.

(of a system) Requiring a high degree of maintenance to ensure proper functioning, and without which it is likely to break down.

(nautical) The tallest mast of a sailing ship that has more than one mast; particularly a full-rigged ship.

plural of gas main

The national postal service of the United Kingdom.

plural of Maine Coon

A large, fluffy semi-longhair domestic cat of a breed that originated in Maine.