1.  Free from dirt or filth; as, clean clothes. [1913 Webster]

2.  Free from that which is useless or injurious; without defects; as, clean land; clean timber. [1913 Webster]

3.  Free from awkwardness; not bungling; adroit; dexterous; as, a clean trick; a clean leap over a fence. [1913 Webster]

4.  Free from errors and vulgarisms; as, a clean style. [1913 Webster]

5.  Free from restraint or neglect; complete; entire. [1913 Webster]
"When ye reap the harvest of your land, thou shalt not make clean riddance of corners of thy field." [1913 Webster]

6.  Free from moral defilement; sinless; pure. [1913 Webster]
"Create in me a clean heart, O God." [1913 Webster]
"That I am whole, and clean, and meet for Heaven" [1913 Webster]

7.  Free from ceremonial defilement. [1913 Webster]

8.  Free from that which is corrupting to the morals; pure in tone; healthy. F. Harrison. [1913 Webster]

9.  Well-proportioned; shapely; as, clean limbs. [1913 Webster]

1.  Without limitation or remainder; quite; perfectly; wholly; entirely. Shak.
"All the people were passed clean over Jordan." [1913 Webster]

2.  Without miscarriage; not bunglingly; dexterously. Henley. [1913 Webster]

   To render clean; to free from whatever is foul, offensive, or extraneous; to purify; to cleanse. [1913 Webster]

clean, adj., adv., v., & n.
--adj.
1 (often foll. by of) free from dirt or contaminating matter, unsoiled.
2 clear; unused or unpolluted; preserving what is regarded as the original state (clean air; clean page).
3 free from obscenity or indecency.
4 a attentive to personal hygiene and cleanliness. b (of children and animals) toilet-trained or house-trained.
5 complete, clear-cut, unobstructed, even.
6 a (of a ship, aircraft, or car) streamlined, smooth. b well-formed, slender and shapely (clean-limbed; the car has clean lines).
7 adroit, skilful (clean fielding).
8 (of a nuclear weapon) producing relatively little fallout.
9 a free from ceremonial defilement or from disease. b (of food) not prohibited.
10 a free from any record of a crime, offence, etc. (a clean driving-licence). b sl. free from suspicion; not carrying incriminating material.
11 (of a taste, smell, etc.) sharp, fresh, distinctive.
12 (of timber) free from knots.
--adv.
1 completely, outright, simply (clean bowled; cut clean through; clean forgot).
2 in a clean manner.
--v.
1 tr. (also foll. by of) & intr. make or become clean.
2 tr. eat all the food on (one's plate).
3 tr. Cookery remove the innards of (fish or fowl).
4 intr. make oneself clean.
--n. the act or process of cleaning or being cleaned (give it a clean).

Idiom:
clean bill of health see BILL(1). clean break a quick and final separation. clean-cut sharply outlined. clean down clean by brushing or wiping. clean hands freedom from guilt. clean-living of upright character. clean out
1 clean thoroughly.
2 sl. empty or deprive (esp. of money). clean-shaven without beard, whiskers, moustache. clean sheet (or slate) freedom from commitments or imputations; the removal of these from one's record.
clean up
1 a clear (a mess) away. b (also absol.) put (things) tidy. c make (oneself) clean.
2 restore order or morality to.
3 sl. a acquire as gain or profit. b make a gain or profit. clean-up n. an act of cleaning up. come clean colloq. own up; confess everything. make a clean breast of see BREAST. make a clean job of colloq. do thoroughly. make a clean sweep of see SWEEP.

Derivative:
cleanable adj. cleanish adj. cleanness n.

Etymology:
OE cl{aelig}ne (adj. & adv.), clene (adv.), f. WG

N  perfection, perfectness, indefectibility, impeccancy, impeccability, pink, beau ideal, phenix, paragon, pink of perfection, acme of perfection, ne plus ultra, summit, cygne noir, philosopher's stone, chrysolite, Koh-i-noor, model, standard, pattern, mirror, admirable Crichton, trump, very prince of, masterpiece, superexcellence, transcendence, perfect, faultless, indefective, indeficient, indefectible, immaculate, spotless, impeccable, free from imperfection, unblemished, uninjured, sound, sound as a roach, in perfect condition, scathless, intact, harmless, seaworthy, right as a trivet, in seipso totus teres atque rotundus, consummate, finished, best, model, standard, inimitable, unparagoned, unparalleled, superhuman, divine, beyond all praise, sans peur et sans reproche, to perfection, perfectly, ad unguem, clean, clean as a whistle, let us go on unto perfection, the perfection of art is to conceal art.

VB  be clean, render clean, clean, cleanse, mundify, rinse, wring, flush, full, wipe, mop, sponge, scour, swab, scrub, brush up, wash, lave, launder, buck, absterge, deterge, decrassify, clear, purify, depurate, despumate, defecate, purge, expurgate, elutriate, lixiviate, edulcorate, clarify, refine, rack, filter, filtrate, drain, strain, disinfect, fumigate, ventilate, deodorize, whitewash, castrate, emasculate, sift, winnow, pick, weed, comb, rake, brush, sweep, rout out, clear out, sweep out, make a clean sweep of.

N  cleanness, cleanliness, purity, cleaning, purification, defecation, purgation, lustration, detersion, abstersion, epuration, mundation, ablution, lavation, colature, disinfection, drainage, sewerage, lavatory, laundry, washhouse, washerwoman, laundress, dhobi, laundryman, washerman, scavenger, dustman, sweep, white wings brush, broom, besom, mop, rake, shovel, sieve, riddle, screen, filter, blotter, napkin, cloth, maukin, malkin, handkerchief, towel, sudary, doyley, doily, duster, sponge, mop, swab, cover, drugget, wash, lotion, detergent, cathartic, purgative, purifier, disinfectant, aperient, benzene, benzine benzol, benolin, bleaching powder, chloride of lime, dentifrice, deobstruent, laxative, clean, cleanly, pure, immaculate, spotless, stainless, taintless, trig, without a stain, unstained, unspotted, unsoiled, unsullied, untainted, uninfected, sweet, sweet as a nut, neat, spruce, tidy, trim, gimp, clean as a new penny, like a cat in pattens, cleaned, kempt, abstergent, cathartic, cleansing, purifying, neatly, clean as a whistle.

N  completeness, completion, integration, allness, entirety, perfection, solidity, solidarity, unity, all, ne plus ultra, ideal, limit, complement, supplement, make-weight, filling, up, impletion, saturation, saturity, high water, high tide, flood tide, spring tide, fill, load, bumper, bellyful, brimmer, sufficiency, complete, entire, whole, perfect, full, good, absolute, thorough, plenary, solid, undivided, with all its parts, all- sided, exhaustive, radical, sweeping, thorough-going, dead, regular, consummate, unmitigated, sheer, unqualified, unconditional, free, abundant, brimming, brimful, topful, topfull, chock full, choke full, as full as an egg is of meat, as full as a vetch, saturated, crammed, replete, fraught, laden, full-laden, full-fraught, full-charged, heavy laden, completing, supplemental, supplementary, ascititious, completely, altogether, outright, wholly, totally, in toto, quite, all out, over head and ears, effectually, for good and all, nicely, fully, through thick and thin, head and shoulders, neck and heel, neck and crop, in all respects, in every respect, at all points, out and out, to all intents and purposes, toto coelo, utterly, clean, clean as a whistle, to the full, to the utmost, to the backbone, hollow, stark, heart and soul, root and branch, down to the ground, to the top of one's bent, as far as possible, a outrance, throughout, from first to last, from beginning to end, from end to end, from one end to the other, from Dan to Beersheba, from head to foot, from top to toe, from top to bottom, de fond en comble, a fond, a capite ad calcem, ab ovo usque ad mala, fore and aft, every, whit, every inch, cap-a-pie, to the end of the chapter, up to the brim, up to the ears, up to the eyes, as a as can be, on all accounts, sous tous les rapports, with a vengeance, with a witness, falsus in uno falsus in omnibus, false in one thing, false in everything, omnem movere lapidem, una scopa nuova spazza bene.

clean and jerk, clean bill of health, clean bomb, clean cut, clean house, clean out, clean room, clean slate, clean sweep, clean up, come clean, dry clean, laminar flow clean room, make clean, steam clean