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.

Any mail or letters that are not welcome or solicited and typically sent in bulk; especially mail of a commercial nature such as advertising circulars and form letters.

Mail sent to a public figure by their fans.

The delivery point where Mail Services delivers and collects mail.

A female servant; a maid.

(rail transport) A train used by the postal service to transport mail, and in some cases, to sort mail en route.

A unique identifier of the form user name@domain name specifying a virtual location to which e-mail can be sent.

a small house / an apartment often on two floors