Source : Webster's Revised Unabridged Dictionary (1913)

Aspen \Asp"en\ ([a^]s"p[e^]n), a.
   Of or pertaining to the aspen, or resembling it; made of
   aspen wood.

Aspen \Asp"en\ ([a^]s"p[e^]n), Asp \Asp\ ([.a]sp), n. [AS.
   [ae]sp, [ae]ps; akin to OHG. aspa, Icel. ["o]sp, Dan. [ae]sp,
   Sw. asp, D. esp, G. espe, ["a]spe, aspe; cf. Lettish apsa,
   Lith. apuszis.] (Bot.)
   One of several species of poplar bearing this name,
   especially the {Populus tremula}, so called from the
   trembling of its leaves, which move with the slightest
   impulse of the air.

Source : WordNet®

aspen
     n : any of several trees of the genus Populus having leaves on
         flattened stalks so that they flutter in the lightest
         wind

Source : Free On-Line Dictionary of Computing

ASPEN
     
         A {toy language} for teaching {compiler}
        construction.
     
        ["ASPEN Language Specifications", T.R. Wilcox, SIGPLAN Notices
        12(11):70-87, Nov 1977].
     
        (1994-11-30)