Source : Webster's Revised Unabridged Dictionary (1913)

Linden \Lin"den\ (l[i^]n"den), n. [Orig. an adj. from lind
   linden tree, AS. lind; akin to D. & G. linde, OHG. linta,
   Icel., Sw., & Dan. lind. Cf. {Lime} linden.] (Bot.)
   (a) A handsome tree ({Tilia Europ[ae]a}), having cymes of
       light yellow flowers, and large cordate leaves. The tree
       is common in Europe.
   (b) In America, the basswood, or {Tilia Americana}.

Source : WordNet®

linden
     n 1: soft light-colored wood of any of various linden trees; used
          in making crates and boxes and in carving and millwork
          [syn: {basswood}]
     2: any of various deciduous trees of the genus Tilia with
        heart-shaped leaves and drooping cymose clusters of
        yellowish often fragrant flowers; several yield valuable
        timber [syn: {linden tree}, {basswood}, {lime}, {lime tree}]