1) to say the same thing as another, i.e. to agree with, assent
2) to concede
2a) not to refuse, to promise
2b) not to deny
2b1) to confess
2b3) to confess, i.e. to admit or declare one's self guilty of what one is accused of
3) to profess
3a) to declare openly, speak out freely
3b) to profess one's self the worshipper of one
4) to praise, celebrate
Part of Speech: verb
Citing in TDNT: 5:199, 687
From a compound of the base of G3674 and G3056; to assent, that is, covenant, acknowledge: - con- (pro-) fess, confession is made, give thanks, promise.
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 ὁμολογέω; click on the second column to search for that grammatical form of the root ὁμολογέω; click on the third column to search for that word and grammatical form; click on the total to search for the root ὁμολογέω.