The Collaborative International Dictionary of English v.0.48:

Stationary \Sta"tion*a*ry\ (-[asl]*r[y^]), a. [L. stationarius:
   cf. F. stationnaire. Cf. Stationer.]
   1. Not moving; not appearing to move; stable; fixed.
      [1913 Webster]

            Charles Wesley, who is a more stationary man, does
            not believe the story.                --Southey.
      [1913 Webster]

   2. Not improving or getting worse; not growing wiser,
      greater, better, more excellent, or the contrary.
      [1913 Webster]

   3. Appearing to be at rest, because moving in the line of
      vision; not progressive or retrograde, as a planet.
      [1913 Webster]

   Stationary air (Physiol.), the air which under ordinary
      circumstances does not leave the lungs in respiration.

   Stationary engine.
      (a) A steam engine that is permanently placed, in
          distinction from a portable engine, locomotive, marine
          engine, etc. Specifically:
      (b) A factory engine, in distinction from a blowing,
          pumping, or other kind of engine which is also
          permanently placed.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stationary \Sta"tion*a*ry\, n.; pl. -ries (-r[i^]z).
   One who, or that which, is stationary, as a planet when
   apparently it has neither progressive nor retrograde motion.
   --Holland.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stationary
    adj 1: standing still; "the car remained stationary with the
           engine running"
    2: not capable of being moved; "stationary machinery"

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "stationary":
   abiding, adamant, adamantine, at a standstill, at anchor,
   changeless, constant, contemplative, continuing, dead-still,
   do-nothing, dormant, durable, enduring, firm, fixed, frozen, idle,
   immobile, immotile, immotive, immovable, immutable, inactive,
   inert, inflexible, intact, inviolate, irremovable, laissez-aller,
   laissez-faire, lasting, meditative, motionless, moveless, neuter,
   neutral, out of commission, paralytic, paralyzed, passive, pat,
   permanent, perpetual, persistent, procrastinating, quiescent,
   quietist, quietistic, remaining, riding at anchor, rigid,
   sedentary, solid, stable, stagnant, stagnating, standpat, static,
   statuelike, staying, steadfast, still, stock-still, sustained,
   torpid, unactive, unaltered, unchangeable, unchanged, unchanging,
   unchecked, undestroyed, unemployed, unfading, unfailing, unmovable,
   unmoved, unmoving, unshifting, unvaried, unvarying, unyielding,
   vegetable, vegetative