The Collaborative International Dictionary of English v.0.48:

Stipulate \Stip"u*late\, a. (Bot.)
   Furnished with stipules; as, a stipulate leaf.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stipulate \Stip"u*late\, v. i. [imp. & p. p. Stipulated; p.
   pr. & vb. n. Stipulating.] [L. stipulatus, p. p. of
   stipulari to stipulate, fr. OL. stipulus firm, fast; probably
   akin to L. stipes a post. Cf. Stiff.]
   To make an agreement or covenant with any person or company
   to do or forbear anything; to bargain; to contract; to settle
   terms; as, certain princes stipulated to assist each other in
   resisting the armies of France.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stipulate
    v 1: specify as a condition or requirement in a contract or
         agreement; make an express demand or provision in an
         agreement; "The will stipulates that she can live in the
         house for the rest of her life"; "The contract stipulates
         the dates of the payments" [syn: stipulate, qualify,
         condition, specify]
    2: give a guarantee or promise of; "They stipulated to release
       all the prisoners"
    3: make an oral contract or agreement in the verbal form of
       question and answer that is necessary to give it legal force