1) a private person as opposed to a magistrate, ruler, king
2) a common soldier, as opposed to a military officer
3) a writer of prose as opposed to a poet
4) in the NT, an unlearned, illiterate, man as opposed to the learned and educated: one who is unskilled in any art
Part of Speech: noun masculine
Citing in TDNT: 3:215, 348
From G2398; a private person, that is, (by implication) an ignoramus (compare "idiot"): - ignorant, rude, unlearned.
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 ἰδιώτης; click on the second column to search for that grammatical form of the root ἰδιώτης; click on the third column to search for that word and grammatical form; click on the total to search for the root ἰδιώτης.