(computer hardware) A large, powerful computer able to manage very many simultaneous tasks and communicate with very many connected terminals; used by large, complex organizations (such as banks and supermarkets) where continuously sustained operation is vital.

Used or accepted broadly rather than by small portions of a population or market.

The principal current in a flow, such as a river or flow of air / (usually with the) That which is common; the norm.

(transitive) To popularize, to normalize, to render mainstream. / (intransitive) To become mainstream.

The continent; the principal land, as distinguished from islands or a peninsula. / The principal island of a group.

A chief support. / Someone or something that can be depended on to make a regular contribution. / (nautical) A stabilising rope from the top of the mainmast to the bottom of the foremast.

plural of Mainer

A native or resident of the state of Maine in the United States of America.

A surname transferred from the given name.

(nautical) The largest (or only) sail on a sailing vessel.