1) customs, toll
2) toll house, place of toll, tax office
3) the place in which the tax collector sat to collect the taxes
Part of Speech: noun neuter
Neuter of a presumed derivative of G5057; a tax gatherer's place of business: - receipt of custom.
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 τελώνιον; click on the second column to search for that grammatical form of the root τελώνιον; click on the third column to search for that word and grammatical form; click on the total to search for the root τελώνιον.