The Collaborative International Dictionary of English v.0.48:

Lithe \Lithe\ (l[imac][th]), v. t. & i. [Icel hl[=y][eth]a. See
   Listen.]
   To listen or listen to; to hearken to. [Obs.] --P. Plowman.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lithe \Lithe\, a. [AS. l[imac][eth]e, for lin[eth]e tender,
   mild, gentle; akin to G. lind, gelind, OHG. lindi, Icel.
   linr, L. lenis soft, mild, lentus flexible, and AS. linnan to
   yield. Cf. Lenient.]
   1. Mild; calm; as, lithe weather. [Obs.]
      [1913 Webster]

   2. Capable of being easily bent; pliant; flexible; limber;
      as, the elephant's lithe proboscis. --Milton.

   Syn: lithesome.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Lithe \Lithe\, v. t. [AS. l[imac][eth]ian. See Lithe, a.]
   To smooth; to soften; to palliate. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

lithe
    adj 1: moving and bending with ease [syn: lissome, lissom,
           lithe, lithesome, slender, supple, svelte,
           sylphlike]

The Free On-line Dictionary of Computing (19 January 2023):

LITHE

   Object-oriented with extensible syntax.

   "LITHE: A Language Combining a Flexible Syntax and Classes",
   D. Sandberg, Conf Rec 9th Ann ACM Sym POPL, ACM 1982,
   pp.142-145.