What does "eaves" mean?

Additional senses

1. 2.Eyelids or eyelashes. And closing eaves of wearied eyes. Tennyson. Eaves board (Arch.), an arris fillet, or a thick board with a feather edge, nailed across the rafters at the eaves of a building, to raise the lower course of slates a little, or to receive the lowest course of tiles; -- called also eaves catch and eaves lath. -- Eaves channel, Eaves gutter, Eaves trough. Same as Gutter, 1. -- Eaves molding (Arch.), a molding immediately below the eaves, acting as a cornice or part of a cornice. -- Eaves swallow (Zoöl.). (a) The cliff swallow; -- so called from its habit of building retort-shaped nests of mud under the eaves of buildings. See Cliff swallow, under Cliff. (b) The European swallow.