The Collaborative International Dictionary of English v.0.48:

Maculate \Mac"u*late\, v. t. [L. maculatus, p. p. of maculare to
   spot. See Macula, and cf. Macule, v.]
   To spot; to stain; to blur.
   [1913 Webster]

         Maculate the honor of their people.      --Sir T.
                                                  Elyot.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Maculate \Mac"u*late\, a. [L. maculatus, p. p.]
   Marked with spots or maculae; blotched; hence, defiled;
   impure; as, most maculate thoughts. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

maculate
    adj 1: morally blemished; stained or impure [syn: defiled,
           maculate]
    2: spotted or blotched
    v 1: make dirty or spotty, as by exposure to air; also used
         metaphorically; "The silver was tarnished by the long
         exposure to the air"; "Her reputation was sullied after the
         affair with a married man" [syn: tarnish, stain,
         maculate, sully, defile]
    2: spot, stain, or pollute; "The townspeople defiled the river
       by emptying raw sewage into it" [syn: foul, befoul,
       defile, maculate]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "maculate":
   besmirched, bespangled, bespeckled, blotched, blotchy, defiled,
   dotted, dotty, flea-bitten, flecked, fleckered, frecked,
   freckle-faced, freckled, freckly, impure, indecent, macular,
   maculated, patchy, peppered, pocked, pockmarked, pocky, pointille,
   pointillistic, polka-dot, punctated, smirched, soiled, spangled,
   spattered, specked, speckled, speckledy, speckly, splashed,
   splattered, splotched, splotchy, spotted, spotty, sprinkled,
   stippled, studded, sullied, tainted, unchaste, unclean, unvirginal,
   unvirtuous