1) a throwing beyond
2a) superiority, excellence, pre-eminence
2b) beyond measure, exceedingly, preeminently
2c) beyond all measure
Part of Speech: noun feminine
Citing in TDNT: 8:520, 1230
From G5235; a throwing beyond others, that is, (figuratively) supereminence; adverbially (with G1519 or G2596) pre-eminently: - abundance, (far more) exceeding, excellency, more excellent, beyond (out of) measure.
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 ὑπερβολή; click on the second column to search for that grammatical form of the root ὑπερβολή; click on the third column to search for that word and grammatical form; click on the total to search for the root ὑπερβολή.