sand-bar joining an island to the mainland, 1899, from Italian tombolo "sand dune," from Latin tumulus "hillock, mound, heap of earth," from PIE root *teue- (2) "to swell" [..]

A coastal feature that forms when a belt sand and/or gravel is deposited between an island and the mainland. This feature is above sea-level for most of the time.

coastal landform created as waves and tides create a narrow, permanent isthmus between a coastal island and the mainland.

a sand belt or bar connecting an island with the mainland.

a sand deposit which joins an island with a nearby land mass.

A bar or spit linking an island to the mainland.

(n) - a bar of sand that connects an island with the mainland

(1) Coastal formation of beach material developed by refraction, diffraction and longshore drift to form a 'neck' connecting a coast to an offshore island or breakwater (see also salient). ( [..]

(geography) A spit of sand linking an island to the mainland (or to another island), formed by longshore drift. ----

A depositional landform connecting an island to the mainland by a narrow piece of land comprised of sand or shingle.