Webster's Revised Unabridged Dictionary · 1913

Alder

Alder (al"dẽr) , noun

[Old English aldir, aller, from Anglo-Saxon alr, aler, alor, akin to Dutch els, German erle, Icelandic erlir, erli, Swed. al, Danish elle, el, Latin alnus, and English elm.]

(Botany) A tree, usually growing in moist land, and belonging to the genus Alnus. The wood is used by turners, etc.; the bark by dyers and tanners. In the U. S. the species of alder are usually shrubs or small trees.
Collocations (1)
Black alder , (a) A European shrub (Rhamnus frangula); Alder buckthorn. (b) An American species of holly (Ilex verticillata), bearing red berries.

Alder (al"dẽr) , adjective

[From ealra, alra, gen. plural of Anglo-Saxon eal. The d is excrescent.]

Of all; -- used in composition; as, alderbest, best of all, alderwisest, wisest of all. [Obsolete] — Chaucer

Also: Aller