The Collaborative International Dictionary of English v.0.48:

Deliberate \De*lib"er*ate\ (d[-e]*l[i^]b"[~e]r*[asl]t), a. [L.
   deliberatus, p. p. of deliberare to deliberate; de- + librare
   to weigh. See Librate.]
   1. Weighing facts and arguments with a view to a choice or
      decision; carefully considering the probable consequences
      of a step; circumspect; slow in determining; -- applied to
      persons; as, a deliberate judge or counselor. "These
      deliberate fools." --Shak.
      [1913 Webster]

   2. Formed with deliberation; well-advised; carefully
      considered; not sudden or rash; as, a deliberate opinion;
      a deliberate measure or result.
      [1913 Webster]

            Settled visage and deliberate word.   --Shak.
      [1913 Webster]

   3. Not hasty or sudden; slow. --Hooker.
      [1913 Webster]

            His enunciation was so deliberate.    --W. Wirt.

   4. having awareness of the likely consequences; intentional.
      [PJC]

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]

The Collaborative International Dictionary of English v.0.48:

Deliberate \De*lib"er*ate\, v. i.
   To take counsel with one's self; to weigh the arguments for
   and against a proposed course of action; to reflect; to
   consider; to hesitate in deciding; -- sometimes with on,
   upon, about, concerning.
   [1913 Webster]

         The woman that deliberates is lost.      --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

deliberate
    adj 1: carefully thought out in advance; "a calculated insult";
           "with measured irony" [syn: deliberate, calculated,
           measured]
    2: unhurried and with care and dignity; "walking at the same
       measured pace"; "with all deliberate speed" [syn: careful,
       deliberate, measured]
    v 1: think about carefully; weigh; "They considered the
         possibility of a strike"; "Turn the proposal over in your
         mind" [syn: consider, debate, moot, turn over,
         deliberate]
    2: discuss the pros and cons of an issue [syn: debate,
       deliberate]

Moby Thesaurus II by Grady Ward, 1.0:

273 Moby Thesaurus words for "deliberate":
   advise with, advised, aforethought, aimed, aimed at, air, ambling,
   analyze, back down, balance, bargain, be abstracted, brood,
   brood over, calculated, call in, calm, canny, canvass, careful,
   cautious, chaw, chew over, chew the cud, circumspect, claudicant,
   cold-blooded, collected, collogue, comment upon, compare notes,
   composed, con over, confer, confer with, confident, conscious,
   consider, considerate, considered, consult, consult with,
   contemplate, contemplated, controvert, cool, counsel, crawling,
   creeping, creeping like snail, deal with, debate, deliberate over,
   deliberate upon, deliberated, demur, designed, digest,
   discourse about, discreet, discuss, discuss with, dispassionate,
   easy, envisaged, envisioned, even, examine, exchange observations,
   exchange views, falter, faltering, fastidious, fear, flagging,
   foot-dragging, foresighted, forethoughtful, gentle, gingerly,
   go into, gradual, guarded, halting, handle, hang back, hasteless,
   have conversations, heedful, hem and haw, hesitant, hesitate,
   hobbled, hobbling, hold conference, hover, hum and haw, idle,
   imperturbable, inactive, indolent, intended, intentional,
   introspect, investigate, jib, judicious, knock around, knowing,
   languid, languorous, lazy, leaving out nothing, leisurely, limping,
   lumbering, meant, measured, meditate, meditate upon, meditated,
   methodical, meticulous, mindful, moderate, mull, mull over, muse,
   muse on, muse over, negotiate, noncommittal, of design, on guard,
   orderly, overlooking no possibility, paced, painstaking, palaver,
   parley, pass under review, pause, pawky, perpend, planned,
   play around with, play with, poking, poky, politic, ponder,
   ponder over, powwow, prearranged, preconceived, premeditated,
   prepense, projected, proposed, provident, prudent, pull back,
   punctilious, purposed, purposeful, purposive, put heads together,
   rap, reason, reason about, reason the point, reason with, refer to,
   reflect, reflect over, regardful, regular, relaxed, reluctant,
   retreat, review, revolve, ruminate, ruminate over, run over, safe,
   sauntering, schemed, scruple, scrupulous, serene, shilly-shally,
   shuffling, shy, sift, sit down together, sit down with, slack,
   slothful, slow, slow as death, slow as molasses, slow as slow,
   slow to act, slow-crawling, slow-foot, slow-going, slow-legged,
   slow-moving, slow-paced, slow-poky, slow-running, slow-sailing,
   slow-stepped, sluggish, snail-paced, snaillike, speculate,
   staggering, steady, stick at, stickle, stop to consider,
   straddle the fence, strain at, strolling, studied, studious, study,
   sure, systematic, take counsel, take up, take up with, talk,
   talk about, talk of, talk over, teleological, tentative,
   think about, think over, think twice about, thorough, thought-out,
   thoughtful, thresh out, toddling, tortoiselike, tottering,
   toy with, treat, trudging, turn over, turtlelike, unadventurous,
   uncommunicative, undaring, unenterprising, unfaltering, unhasty,
   unhesitating, unhurried, unprecipitate, unruffled, ventilate,
   voluntary, waddling, weigh, willful, withdraw, witting, yield