Thayer's Greek Lexicon

 1. clean, pure
  1) physically
1a1. purified by fire
1a2. in a similitude, like a vine cleansed by pruning and so
fitted to bear fruit
  2) in a levitical sense
1b1. clean, the use of which is not forbidden,
imparts no uncleanness
  3) ethically
1c1. free from corrupt desire, from sin and guilt
1c2. free from every admixture of what is false, sincere genuine
1c3. blameless, innocent
1c4. unstained with the guilt of anything

For Synonyms see entry G5840