- the principal land of a country, region, etc., as distinguished from adjacent islands or a peninsula: the mainland of Greece.
- (in Hawaii) the 48 contiguous states of the U.S.
- the largest of the Shetland Islands. About 200 sq. mi. (520 sq. km).
- Pomona(def 3).
- the main part of a land mass as opposed to an island or peninsula
- the mainland a particular landmass as viewed from a nearby island with which it has close links, such as Great Britain as viewed from Northern Ireland or continental Australia as viewed from Tasmania
- an island off N Scotland: the largest of the Shetland Islands. Chief town: Lerwick. Pop: 17 550 (2001). Area: about 583 sq km (225 sq miles)
- Also called: Pomona an island off N Scotland: the largest of the Orkney Islands. Chief town: Kirkwall. Pop: 15 315 (2001). Area: 492 sq km (190 sq miles)
- the Mainland NZ a South Islanders’ name for South Island
n.c.1400, from main (adj.) + land (n.). Usually referring to continuous bodies of land and not islands or peninsulas. Related: Mainlander.