The Collaborative International Dictionary of English v.0.48:

Engineer \En`gi*neer"\, n. [OE. enginer: cf. OF. engignier, F.
   ing['e]nieur. See Engine, n.]
   1. A person skilled in the principles and practice of any
      branch of engineering; as, a civil engineer; an electronic
      engineer; a chemical engineer. See under Engineering, n.
      [1913 Webster +PJC]

   2. One who manages as engine, particularly a steam engine; an
      engine driver.
      [1913 Webster]

   3. One who carries through an enterprise by skillful or
      artful contrivance; an efficient manager. [Colloq.]
      [1913 Webster]

   Civil engineer, a person skilled in the science of civil
      engineering.

   Military engineer, one who executes engineering works of a
      military nature. See under Engineering.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Engineer \En`gi*neer"\, v. t. [imp. & p. p. Engineered; p. pr.
   & vb. n. Engineering.]
   1. To lay out or construct, as an engineer; to perform the
      work of an engineer on; as, to engineer a road. --J.
      Hamilton.
      [1913 Webster]

   2. To use contrivance and effort for; to guide the course of;
      to manage; as, to engineer a bill through Congress.
      [Colloq.]
      [1913 Webster] Engineer Corps

WordNet (r) 3.0 (2006):

engineer
    n 1: a person who uses scientific knowledge to solve practical
         problems [syn: engineer, applied scientist,
         technologist]
    2: the operator of a railway locomotive [syn: engineer,
       locomotive engineer, railroad engineer, engine driver]
    v 1: design as an engineer; "He engineered the water supply
         project"
    2: plan and direct (a complex undertaking); "he masterminded the
       robbery" [syn: mastermind, engineer, direct,
       organize, organise, orchestrate]

Moby Thesaurus II by Grady Ward, 1.0:

222 Moby Thesaurus words for "engineer":
   Seabee, accomplish, achieve, act, aeronautical engineer, agent,
   agricultural engineer, ancestors, angle, apprentice, architect,
   arrange, artificer, artist, author, automotive engineer,
   be productive, be responsible for, begetter, beginner, brew,
   bring about, bring into being, bring to fruition, build, builder,
   cabal, call the signals, captain, carry on, cause,
   ceramic engineer, chemical engineer, civil engineer, clear,
   clear the hurdle, collude, combat engineer, come along, come on,
   command, communications engineer, complot, conceiver, concoct,
   conduct, conductor, connive, conspire, construct, constructor,
   contrive, contriver, control, cook up, countermine, counterplot,
   craftsman, creator, cut the mustard, designer, develop, devise,
   deviser, direct, discoverer, do, driver, effector, effectuate,
   electrical engineer, electronics engineer, engenderer,
   engine driver, engineman, execute, executor, executrix, father,
   finagle, finesse, founder, frame, frame up, fuel engineer,
   functionary, generator, geological engineer, gerrymander,
   get along, get by, get on, go on, govern, gripman, grower, hack it,
   handle, handler, hatch, hatch a plot, hatch up, head, head up,
   highway engineer, hogger, hoghead, hydraulic engineer, inaugurator,
   industrial engineer, industrialist, industrialize, initiator,
   instigator, institutor, intrigue, introducer, invent, inventor,
   jockey, journeyman, lay a plot, lead, lead on, machinate, make,
   make it, make out, make the grade, make the rules, maker, manage,
   manage somehow, maneuver, manipulate, manipulator, manufacturer,
   marine engineer, mass-produce, master, master craftsman,
   mastermind, mechanic, mechanical engineer, metallurgical engineer,
   metallurgist, military engineer, mother, motorman, muddle through,
   negotiate, nuclear engineer, officer, operant, operate, operative,
   operator, order, ordnance engineer, organize, organizer, originate,
   originator, overproduce, past master, perform, petroleum engineer,
   pilot, pioneer, plan, planner, play games, plot, power engineer,
   power-supply engineer, precursor, prescribe, prime mover, produce,
   producer, product engineer, pull strings, pull the strings,
   put over, put through, quarterback, radar engineer, radio engineer,
   raiser, realize, realizer, regulate, repairman, rig,
   rocket engineer, run, runner, sanitary engineer, sapper,
   sapper and miner, scheme, scrape along, set up, shaper, sire,
   skipper, smith, steam engineer, steersman, succeed in, swing,
   swing the deal, take command, take the lead, technician,
   ventilation engineer, volume-produce, wangle,
   water-supply engineer, work, worry along, wright