The Collaborative International Dictionary of English v.0.48:

Imaginary \Im*ag"i*na*ry\, a. [L. imaginarius: cf. F.
   imaginaire.]
   Existing only in imagination or fancy; not real; fancied;
   visionary; ideal.
   [1913 Webster]

         Wilt thou add to all the griefs I suffer
         Imaginary ills and fancied tortures?     --Addison.
   [1913 Webster]

   Imaginary calculus See under Calculus.

   Imaginary expression or Imaginary quantity (Alg.), an
      algebraic expression which involves the impossible
      operation of taking the square root of a negative
      quantity; as, [root]-9, a + b [root]-1.

   Imaginary points, lines, surfaces, etc. (Geom.),
      points, lines, surfaces, etc., imagined to exist, although
      by reason of certain changes of a figure they have in fact
      ceased to have a real existence.

   Syn: Ideal; fanciful; chimerical; visionary; fancied; unreal;
        illusive.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

184 Moby Thesaurus words for "lines":
   Konzentrationslager, Lager, MO, actor, air, algorithm, antagonist,
   antihero, approach, attack, back band, backstrap, barrack,
   barracks, bearing, bearing rein, bellyband, bit, bit part, bivouac,
   blinders, blinds, book, breeching, bridle, brow, camp, campground,
   campsite, cantonment, caparison, carriage, casern, cast,
   cast of countenance, cavesson, character, checkrein, cheekpiece,
   chinband, cinch, collar, color, complexion, concentration camp,
   configuration, continuity, contour, countenance, course, crownband,
   crupper, cue, curb, delineation, demeanor, detention camp,
   encampment, face, facial appearance, fashion, fat part, favor,
   feature, features, feeder, figuration, figure, form, framework,
   gag swivel, garb, genre, gestalt, girth, guise, hackamore, halter,
   hames, hametugs, harness, headgear, headstall, heavy, hero,
   heroine, hip straps, hobo jungle, ingenue, jaquima, jerk line,
   lead, lead role, leading lady, leading man, leading woman,
   libretto, line, line of action, lineaments, looks, main features,
   manner, manner of working, martingale, means, method, methodology,
   mien, mode, mode of operation, mode of procedure, modus operandi,
   movement, noseband, order, outline, part, pencil, person,
   personage, physiognomy, piece, playbook, pole strap, port, posture,
   practice, presence, procedure, proceeding, process, profile,
   protagonist, reins, relief, ribbons, role, routine, saddle,
   scenario, scene plot, school, score, script, shaft tug, shapes,
   shooting script, side, side check, silhouette, skeleton, snaffle,
   soubrette, stance, straight part, style, supporting character,
   supporting role, surcingle, system, tack, tackle, technique, text,
   the drill, the grand style, the how, the way of, title role, tone,
   tournure, traits, trappings, tug, turn, villain, visage, walk-on,
   walking part, way, winker braces, wise, yoke



Easton's 1897 Bible Dictionary:

Lines
   were used for measuring and dividing land; and hence the word
   came to denote a portion or inheritance measured out; a
   possession (Ps. 16:6).