The Collaborative International Dictionary of English v.0.48:

Deliberate \De*lib"er*ate\ (d[-e]*l[i^]b"[~e]r*[=a]t), v. t.
   [imp. & p. p. Deliberated; p. pr. & vb. n. Deliberating.]
   To weigh in the mind; to consider the reasons for and
   against; to consider maturely; to reflect upon; to ponder;
   as, to deliberate a question.
   [1913 Webster]