The Collaborative International Dictionary of English v.0.48:

Soak \Soak\, v. t. [imp. & p. p. Soaked; p. pr. & vb. n.
   Soaking.] [OE. soken, AS. socian to sioak, steep, fr.
   s?can, s?gan, to suck. See Suck.]
   1. To cause or suffer to lie in a fluid till the substance
      has imbibed what it can contain; to macerate in water or
      other liquid; to steep, as for the purpose of softening or
      freshening; as, to soak cloth; to soak bread; to soak salt
      meat, salt fish, or the like.
      [1913 Webster]

   2. To drench; to wet thoroughly.
      [1913 Webster]

            Their land shall be soaked with blood. --Isa. xxiv.
                                                  7.
      [1913 Webster]

   3. To draw in by the pores, or through small passages; as, a
      sponge soaks up water; the skin soaks in moisture.
      [1913 Webster]

   4. To make (its way) by entering pores or interstices; --
      often with through.
      [1913 Webster]

            The rivulet beneath soaked its way obscurely through
            wreaths of snow.                      --Sir W.
                                                  Scott.
      [1913 Webster]

   5. Fig.: To absorb; to drain. [Obs.] --Sir H. Wotton.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Soaking \Soak"ing\, a.
   Wetting thoroughly; drenching; as, a soaking rain. --
   Soak"ing*ly, adv.
   [1913 Webster]

WordNet (r) 3.0 (2006):

soaking
    adv 1: extremely wet; "dripping wet"; "soaking wet" [syn:
           soaking, sopping, dripping]
    n 1: the process of becoming softened and saturated as a
         consequence of being immersed in water (or other liquid);
         "a good soak put life back in the wagon" [syn: soak,
         soakage, soaking]
    2: the act of making something completely wet; "he gave it a
       good drenching" [syn: drenching, soaking, souse,
       sousing]
    3: washing something by allowing it to soak [syn: soak,
       soaking]

Moby Thesaurus II by Grady Ward, 1.0:

106 Moby Thesaurus words for "soaking":
   absorbent, adsorbent, assimilative, awash, bathed, bibulous,
   blotting, brewing, chemisorptive, chemosorptive, concentration,
   dampening, decoction, deluged, digestive, dipped, distillation,
   dousing, dowsing, drench, drenched, drenching, dribbling, dripping,
   dripping wet, drowned, ducking, dunking, endosmotic, engulfed,
   exosmotic, expression, flooded, humectant, imbibitory, imbruement,
   imbuement, immersed, impregnation, infiltration, infusion,
   injection, instillation, instillment, interpenetration, inundated,
   irrigational, irriguous, leaching, lixiviation, macerated,
   maceration, marination, moistening, oozing, osmotic, overflowed,
   penetration, percolation, permeated, permeation, pervasion,
   pressing, pulping, rendering, rendition, resorbent, saturated,
   saturating, saturation, seeping, seething, soak, soakage, soaked,
   soaking wet, soaky, sodden, soggy, sopping, sopping wet, soppy,
   sorbent, souse, soused, sousing, spongeous, spongy, squeezing,
   steeped, steeping, streaming, submerged, submersed, suffusion,
   swamped, thirsty, watering, waterlogged, watersoaked, weeping,
   weltering, wet, wetting, whelmed, wringing wet