1) to take for oneself, to prefer, choose
2) to choose by vote, elect to office
Part of Speech: verb
Citing in TDNT: 1:180, 27
Probably akin to G142; to take for oneself, that is, to prefer. Some of the forms are borrowed from a cognate (ἕλλομαι hellomai), which is otherwise obsolete: - choose. Some of the forms are borrowed from a cognate hellomai, hel-lom-ahee; which is otherwise obsolete.
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 αἱρέομαι; click on the second column to search for that grammatical form of the root αἱρέομαι; click on the third column to search for that word and grammatical form; click on the total to search for the root αἱρέομαι.