Cliff n.  A high, steep rock; a precipice.
 Cliff swallow Zool., a North American swallow (Petrochelidon lunifrons), which builds its nest against cliffs; the eaves swallow.
 Eaves n. pl.
 1. Arch. The edges or lower borders of the roof of a building, which overhang the walls, and cast off the water that falls on the roof.
 2. Brow; ridge. [Obs.] “Eaves of the hill.”
 3. 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.
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 cliff swallow
      n : North American swallow that lives in colonies and builds
          bottle-shaped mud nests on cliffs and walls [syn: Hirundo
          pyrrhonota]