From The Collaborative International Dictionary of English v.0.48:
Clean \Clean\ (kl[=e]n), a. [Compar. Cleaner (kl[=e]n"[~e]r); superl. Cleanest.] [OE. clene, AS. cl[=ae]ne; akin to OHG. chleini pure, neat, graceful, small, G. klein small, and perh. to W. glan clean, pure, bright; all perh. from a primitive, meaning bright, shining. Cf. Glair.] 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. --Lev. xxiii. 22. [1913 Webster]
6. Free from moral defilement; sinless; pure. [1913 Webster]
Create in me a clean heart, O God. --Ps. li. 10 [1913 Webster]
That I am whole, and clean, and meet for Heaven --Tennyson. [1913 Webster]
7. (Script.) Free from ceremonial defilement. [1913 Webster]
8. Free from that which is corrupting to the morals; pure in tone; healthy. "Lothair is clean." --F. Harrison. [1913 Webster]
9. Well-proportioned; shapely; as, clean limbs. [1913 Webster]
A clean bill of health, a certificate from the proper authority that a ship is free from infection.
Clean breach. See under Breach, n., 4.
To make a clean breast. See under Breast. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Clean \Clean\, adv. 1. Without limitation or remainder; quite; perfectly; wholly; entirely. "Domestic broils clean overblown." --Shak. "Clean contrary." --Milton. [1913 Webster]
All the people were passed clean over Jordan. --Josh. iii. 17. [1913 Webster]
2. Without miscarriage; not bunglingly; dexterously. [Obs.] "Pope came off clean with Homer." --Henley. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Clean \Clean\ (kl[=e]n), v. t. [imp. & p. p. Cleaned (kl[=e]nd); p. pr. & vb. n. Cleaning.] [See Clean, a., and cf. Cleanse.] To render clean; to free from whatever is foul, offensive, or extraneous; to purify; to cleanse. [1913 Webster]
To clean out, to exhaust; to empty; to get away from (one) all his money. [Colloq.] --De Quincey. [1913 Webster]