The Collaborative International Dictionary of English v.0.48:

Incline \In*cline"\, v. i. [imp. & p. p. Inclined; p. pr. &
   vb. n. Inclining.] [OE. inclinen, enclinen, OF. encliner,
   incliner, F. incliner, L. inclinare; pref. in- in + clinare
   to bend, incline; akin to E. lean. See Lean to incline.]
   [1913 Webster]
   1. To deviate from a line, direction, or course, toward an
      object; to lean; to tend; as, converging lines incline
      toward each other; a road inclines to the north or south.
      [1913 Webster]

   2. Fig.: To lean or tend, in an intellectual or moral sense;
      to favor an opinion, a course of conduct, or a person; to
      have a propensity or inclination; to be disposed.
      [1913 Webster]

            Their hearts inclined to follow Abimelech. --Judges
                                                  ix. 3.
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            Power finds its balance, giddy motions cease
            In both the scales, and each inclines to peace.
                                                  --Parnell.
      [1913 Webster]

   3. To bow; to incline the head. --Chaucer.

   Syn: To lean; slope; slant; tend; bend.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Incline \In*cline"\, v. t.
   1. To cause to deviate from a line, position, or direction;
      to give a leaning, bend, or slope to; as, incline the
      column or post to the east; incline your head to the
      right.
      [1913 Webster]

            Incline thine ear, O Lord, and hear.  --Is. xxxvii.
                                                  17.
      [1913 Webster]

   2. To impart a tendency or propensity to, as to the will or
      affections; to turn; to dispose; to influence.
      [1913 Webster]

            Incline my heart unto thy testimonies. --Ps. cxix.
                                                  36.
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            Incline our hearts to keep this law.  --Book of Com.
                                                  Prayer.
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   3. To bend; to cause to stoop or bow; as, to incline the head
      or the body in acts of reverence or civility.
      [1913 Webster]

            With due respect my body I inclined.  --Dryden.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Incline \In*cline"\, n.
   An inclined plane; an ascent or descent; a grade or gradient;
   a slope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

incline
    n 1: an elevated geological formation; "he climbed the steep
         slope"; "the house was built on the side of a mountain"
         [syn: slope, incline, side]
    2: an inclined surface connecting two levels [syn: ramp,
       incline]
    v 1: have a tendency or disposition to do or be something; be
         inclined; "She tends to be nervous before her lectures";
         "These dresses run small"; "He inclined to corpulence"
         [syn: tend, be given, lean, incline, run]
    2: bend or turn (one's ear) towards a speaker in order to listen
       well; "He inclined his ear to the wise old man"
    3: lower or bend (the head or upper body), as in a nod or bow;
       "She inclined her head to the student"
    4: be at an angle; "The terrain sloped down" [syn: slope,
       incline, pitch]
    5: feel favorably disposed or willing; "She inclines to the view
       that people should be allowed to expres their religious
       beliefs"
    6: make receptive or willing towards an action or attitude or
       belief; "Their language inclines us to believe them" [syn:
       dispose, incline] [ant: disincline, indispose]

Moby Thesaurus II by Grady Ward, 1.0:

195 Moby Thesaurus words for "incline":
   acclivity, acquiesce, address, affect, agree, aim, angle, ascend,
   ascent, back stairs, bank, be agreeable to, be disposed to,
   be dying to, be eager, be game, be open to, be predisposed,
   be ready, be spoiling for, be willing, bear, bend, bend to, bevel,
   bezel, bias, bow, bring, cant, careen, carry, cast, choose rather,
   chute, climb, collaborate, color, companion, companionway, conduce,
   consent, contribute, cooperate, decide, decline, declivity,
   deflect, descend, descent, determine, dip, dispose, drive, drop,
   easy slope, engage, enlist, escalier, fall, fall away, fall off,
   favor, feel about it, fire escape, fleam, flight of steps,
   gentle slope, get to do, glacis, go, go along with, go downhill,
   go uphill, grade, gradient, gravitate, hanging gardens,
   have a bias, have a tendency, have preference, have rather, head,
   heel, helicline, hill, hillside, hold a heading, honor before,
   impel, inclination, incline toward, inclined plane, induce,
   influence, interest in, keel, landing, landing stage,
   launching ramp, lay, lead, lean, lean toward, lean towards,
   leaning, level, like better, list, look at it, look kindly upon,
   look to, lure, make, move, not hesitate to, perron, persuade,
   pitch, please, plunge, plunge into, point, point to, precipitate,
   predispose, prefer, prefer to, prejudice, procure, prompt, rake,
   ramp, rather, recline, redound to, retreat, rise, scarp, see fit,
   serve, set, set before, set toward, settle, shelve, shelving beach,
   show a tendency, show preference, side, sidle, sink, slant, slope,
   soften up, spiral staircase, staircase, stairs, stairway,
   steep slope, steer, stepping-stones, steps, stiff climb, stile,
   subside, swag, sway, talus, tempt, tend, tend to go, tend toward,
   think best, think fit, think proper, tilt, tin, tinge, tip, tone,
   train, treads and risers, trend, turn, uprise, verge, view, warp,
   wear down, weigh with, work, work toward, would as leave,
   would as lief