1) a crown
1a) a mark of royal or (in general) exalted rank
1a1) the wreath or garland which was given as a prize to victors in public games
1b) metaphorically the eternal blessedness which will be given as aprize to the genuine servants of God and Christ: the crown (wreath) which is the reward of the righteousness
1c) that which is an ornament and honour to one
Part of Speech: noun masculine
Citing in TDNT: 7:615, 1078
From an apparently primary "stepho" (to twine or wreathe); a chaplet (as a badge of royalty, a prize in the public games or a symbol of honor generally; but more conspicuous and elaborate than the simple fillet, G1238), literally or figuratively: - crown.
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 στέφανος; click on the second column to search for that grammatical form of the root στέφανος; click on the third column to search for that word and grammatical form; click on the total to search for the root στέφανος.