1) a messenger, envoy, one who is sent, an angel, a messenger from God
Part of Speech: noun masculine
Citing in TDNT: 1:74, 12
From ἀγγέλλω aggellô (probably derived from G71; compare G34; to bring tidings); a messenger; especially an "angel"; by implication a pastor: - angel, messenger.
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 ἄγγελος; click on the second column to search for that grammatical form of the root ἄγγελος; click on the third column to search for that word and grammatical form; click on the total to search for the root ἄγγελος.