1) one who receives by lot, an heir
1a) an heir
1b) in Messianic usage, one who receives his allotted possession by right of sonship
2) one who has acquired or obtained the portion allotted to him
Part of Speech: noun masculine
Citing in TDNT: 3:767, 442
From G2819 and the base of G3551 (in its original sense of partitioning, that is, [reflexively] getting by apportionment); a sharer by lot, that is, an inheritor (literally or figuratively); by implication a possessor: - heir.
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 κληρονόμος; click on the second column to search for that grammatical form of the root κληρονόμος; click on the third column to search for that word and grammatical form; click on the total to search for the root κληρονόμος.