1) to be without a share in
2) to miss the mark
3) to err, be mistaken
4) to miss or wander from the path of uprightness and honour, to do or go wrong
5) to wander from the law of God, violate God's law, sin
Part of Speech: verb
Citing in TDNT: 1:267, 44
Perhaps from G1 (as a negative particle) and the base of G3313; properly to miss the mark (and so not share in the prize), that is, (figuratively) to err, especially (morally) to sin: - for your faults, offend, sin, trespass.
These two sites give similar information, with the definition from several dictionaries and statistics on the use of the word.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ἁμαρτάνω; click on the second column to search for that grammatical form of the root ἁμαρτάνω; click on the third column to search for that word and grammatical form; click on the total to search for the root ἁμαρτάνω.