ETYM AS. dael; akin to LG., Dutch, Swed., Dan., OS., and Goth. dal, Icel. dalr, Old High Germ. tal, German thal, and perh. to Greek tholos a rotunda, Skr. dhâra depth. Related to Dell.
(British) An open river valley (in a hilly area).

ETYM Old Eng. dene, deene, Old Fren. deien, dien, French doyen, eldest of a corporation, a dean, Latin decanus the chief of ten, one set over ten persons, e.g., over soldiers or over monks, from decem ten. Related to Ten, Decemvir.
1. The senior member of a group; SYN. doyen.
2. An administrator in charge of a division of a university or college.
3. (Roman Catholic) The head of the College of Cardinals.
In education, in universities and medical schools, the head of administration; in the colleges of Oxford and Cambridge, UK, the member of the teaching staff charged with the maintenance of discipline; in Roman Catholicism, senior cardinal bishop, head of the college of cardinals; in the Anglican Communion, head of the chapter of a cathedral or collegiate church (a rural dean presides over a division of an archdeaconry).

ETYM AS. del, akin to Eng. dale; cf. Dutch delle, del, low ground. Related to Dale.
A small wooded hollow; SYN. dingle.

British; valley

ETYM Of Celtic origin; cf. W. glyn a deep valley, Irish and Gael. gleann valley, glen.
(Scottish) A narrow secluded valley (in the mountains).

ETYM Old Eng. trough, trogh, as. trog, troh.
A narrow depression (as in the earth or between ocean waves or in the ocean bed).

ETYM Old Eng. val, French val, Latin vallis. Related to Avalanche, Vail to lower, Valley.
(Homonym: veil) (Latin) “farewell”.
A tract of low ground, or of land between hills; a valley.

ETYM Old Eng. vale, valeie, Old Fren. valée, valede, French vallée, Late Lat. vallata, Latin vallis, valles. Related to Vale.
A long depression in the surface of the land that usually contains a river; SYN. vale.