1) to fight
1a) of armed combatants, or those who engage in a hand to hand struggle
1b) of those who engage in a war of words, to quarrel, wrangle, dispute
1c) of those who contend at law for property and privileges
Part of Speech: verb
Citing in TDNT: 4:527, 573
Middle voice of an apparently primary verb; to war, that is, (figuratively) to quarrel, dispute: - fight, strive.
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 μάχομαι; click on the second column to search for that grammatical form of the root μάχομαι; click on the third column to search for that word and grammatical form; click on the total to search for the root μάχομαι.