The Collaborative International Dictionary of English v.0.48:

Elongate \E*lon"gate\, v. t. [imp. & p. p. Elongated; p. pr. &
   vb. n. Elongating.] [LL. elongatus, p. p. of elongare to
   remove, to prolong; e + L. longus long. See Long, a., and
   cf. Eloign.]
   1. To lengthen; to extend; to stretch; as, to elongate a
      line.
      [1913 Webster]

   2. To remove further off. [Obs.] --Sir T. Browne.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Elongate \E*lon"gate\, v. i.
   To depart to, or be at, a distance; esp., to recede
   apparently from the sun, as a planet in its orbit. [R.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Elongate \E*lon"gate\, a. [LL. elongatus.]
   Drawn out at length; elongated; as, an elongate leaf. "An
   elongate form." --Earle.
   [1913 Webster]

WordNet (r) 3.0 (2006):

elongate
    adj 1: (of a leaf shape) long and narrow [syn: linear,
           elongate]
    2: having notably more length than width; being long and
       slender; "an elongate tail tapering to a point"; "the old
       man's gaunt and elongated frame" [syn: elongate,
       elongated]
    v 1: make long or longer by pulling and stretching; "stretch the
         fabric" [syn: elongate, stretch]