Yours, Etc.: Origins and Uses of 8 Sign-Offs
1818 as a purely geographical term, from continent + -al (1). In reference to the European mainland (as opposed to Great Britain), recorded from 1760. Continental breakfast (the kind eaten on the continent as opposed to the kind eaten in Britain) is attested by 1855. In reference to the British American colonies from 1774; the Continental Congress is attested from 1775; continental divide in use by 1865; continental rise in geology from 1959; continental slope from 1907. Continental shelf first attested 1888.