The Collaborative International Dictionary of English v.0.48:

Moldy \Mold"y\, Mouldy \Mould"y\, a. [Compar. Moldieror
   Mouldier; superl. Moldiest or Mouldiest.] [From Mold
   the growth of fungi.]
   Overgrown with, or containing, mold; smelling of mold; as,
   moldy cheese or bread.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mould \Mould\ (m[=o]lt), Moulder \Mould"er\ (m[=o]ld"[~e]r),
Mouldy \Mould"y\ (m[=o]ld"[y^]), etc.
   See Mold, Molder, Moldy, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mouldy
    adj 1: covered with or smelling of mold; "moldy bread"; "a moldy
           (or musty) odor" [syn: moldy, mouldy, musty]

Moby Thesaurus II by Grady Ward, 1.0:

489 Moby Thesaurus words for "mouldy":
   Ectocarpales, Phaeophyceae, Platonic form, Platonic idea,
   accommodate, accommodate with, accord, acres, adapt, adapt to,
   adenovirus, adjust, adjust to, aerobe, aerobic bacteria,
   aesthetic form, aged, agree with, algae, alluvion, alluvium,
   amoeba, anaerobe, anaerobic bacteria, anatomy, ancient, animus,
   antediluvian, aptitude, arable land, archetype, architectonics,
   architecture, aroma, arrangement, art form, assemble,
   assimilate to, attribute, autophyte, bacillus, bacteria, bacterium,
   badge, be guided by, bean, bend, bent, bias, biodegradability,
   biodegradation, blast, blight, block out, blood, body-build,
   bracken, brand, break up, breakup, breed, brown algae, bug, build,
   building, cachet, cancer, canker, carious, carve, cast, casting,
   character, characteristic, characteristics, chime in with, chisel,
   clan, clay, climber, clod, coccus, color, complexion, comply,
   comply with, compose, composition, compound, concoct, conferva,
   confervoid, configuration, conform, conformation, constituents,
   constitution, construct, construction, correct, correspond,
   corrosion, corrupt, corruption, crasis, create, creation, creeper,
   crumble, crumble into dust, crust, cut, decay, decayed, decaying,
   decompose, decomposed, decomposing, decomposition, degradability,
   degradation, denomination, description, designation, devise,
   dharma, diathesis, diatom, die, differentia, differential,
   dilapidation, dirt, discipline, disease-producing microorganism,
   disintegrate, disintegration, disorganization, disposition,
   dissolution, distinctive feature, dry land, dry rot, dust, earmark,
   earth, eccentricity, echovirus, efform, elaborate, enterovirus,
   erect, ethos, evolve, extrude, fabric, fabricate, fabrication,
   fall in with, fall into decay, fall to pieces, fashion, fashioning,
   feather, feature, fern, fester, fiber, figuration, figure,
   filterable virus, fit, fix, flavor, follow, forge, forging, form,
   formalize, format, formation, formulate, found, frame, freehold,
   fruits and vegetables, fucus, fudge together, fungi, fungus,
   gangrene, gear to, genius, genre, genus, germ, get up, getup,
   glebe, go bad, go by, go to pieces, grain, gram-negative bacteria,
   gram-positive bacteria, grapevine, grassland, green algae, ground,
   gulfweed, gust, habit, hallmark, harmonize, herb, heterophyte, hew,
   hue, humor, humors, idiocrasy, idiosyncrasy, ilk, impress,
   impression, inclination, index, indite, individualism, inner form,
   intaglio, ivy, kelp, keynote, kidney, kin, kind, knead, knock out,
   label, land, landholdings, last, lay out, layout, leaning, legume,
   lentil, liana, lichen, lick into shape, line, lineaments,
   lithosphere, liverwort, lot, make, make conform, make up, makeup,
   making, manner, mannerism, manufacture, marginal land, mark,
   marking, marl, matrix, mature, meet, mental set, mettle, microbe,
   microorganism, mildew, mildewed, mind, mind-set, mint, modality,
   mode, model, mold, molder, molding, molds, mortify, moss, moth,
   moth and rust, mushroom, must, musty, nature, necrose, negative,
   nonfilterable virus, number, observe, odor, old-fashioned,
   organic structure, organism, organization, outdated, oxidation,
   oxidization, parasite, parasitic plant, particularity,
   patch together, pathogen, pattern, patterning, pea, peculiarity,
   persuasion, perthophyte, pest, phylum, physique, phytoplankton,
   picornavirus, piece together, plan, planktonic algae,
   plant families, predilection, predisposition, prefabricate,
   preference, prepare, proclivity, produce, production, propensity,
   property, prototype, protozoa, protozoon, puffball, pulse, punch,
   put together, put up, putrefy, putresce, putrescent, putrid,
   quality, quirk, race, raise, rancid, rank, rankle, real estate,
   real property, rear, reconcile, rectify, red algae, region,
   regolith, reovirus, resolution, rhinovirus, rickettsia, rockweed,
   rot, rotten, rotting, rough out, roughcast, roughhew,
   rub off corners, run up, rust, saprophyte, sargasso, sargassum,
   savor, sculpt, sculpture, sea lentil, sea moss, sea wrack, seal,
   seaweed, set, set up, settle, setup, shape, shaping, shoe last,
   significant form, singularity, slant, smack, smut, sod, soil,
   somatotype, sort, specialty, species, sphacelate, spirillum,
   spirit, spirochete, spoil, spoilage, spoiled, spoilt, spore, stale,
   stamp, staphylococcus, straighten, strain, streak, streptococcus,
   stripe, structure, structuring, style, subaerial deposit, subsoil,
   succulent, suchness, suit, suppurate, system, tailor, taint,
   tally with, tang, taste, tectonics, temper, temperament, template,
   tendency, tenor, terra, terra firma, terrain, territory, texture,
   thallogens, the country, the like of, the likes of, thermoform,
   tissue, toadstool, token, tone, topsoil, trait, tribe, trick,
   trypanosome, turn, turn of mind, twist, type, unused, variety,
   vein, vetch, vibrio, vine, virus, warp, warp and woof, way, weave,
   web, whomp up, woodland, work, worm, wort, wrack, write, yield



Easton's 1897 Bible Dictionary:

Mouldy
   Of the Gibeonites it is said that "all the bread of their
   provision was dry and mouldy" (Josh. 9:5, 12). The Hebrew word
   here rendered "mouldy" (nikuddim) is rendered "cracknels" in 1
   Kings 14:3, and denotes a kind of crisp cake. The meaning is
   that the bread of the Gibeonites had become dry and hard, hard
   as biscuits, and thus was an evidence of the length of the
   journey they had travelled.