What is the meaning of Clough?

A narrow valley; a cleft in a hillside; a ravine, glen, or gorge.

A sluice used in returning water to a channel after depositing its sediment on the flooded land.

The cleft or fork of a tree; crotch.

A wood; weald.

Alternative form of cloff (allowance of two pounds in every three hundredweight)

A narrow valley; a ravine.

A cliff; a precipice.

Pokorny, Julius (1959) “356-364”, in Indogermanisches etymologisches Wörterbuch [Indo-European Etymological Dictionary] (in German), volume 2, Bern, München: Francke Verlag, pages 356-364

Source: wiktionary.org