1) back, behind, after, afterwards
1a) of place: things that are behind
1b) of time: after
Part of Speech: adverb
Citing in TDNT: 5:289, 702
From the same as G3693 with enclitic of direction; to the back, that is, aback (as adverb or preposition of time or place; or as noun): - after, back (-ward), (+ get) behind, + follow.
|(ἀπέρχομαι εἰς τὰ ὀπίσω) no longer follow||36.36|
|(ἐπιβάλλω τὴν χεῖρα ἐπ᾽ ἄροτρον καὶ βλέπω εἰς τὰ ὀπίσω) start to do and then hesitate||68.6|
|(ἀπέρχομαι ὀπίσω σαρκὸς ἑτέρας) have homosexual intercourse||88.279|
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 ὀπίσω; click on the second column to search for that grammatical form of the root ὀπίσω; click on the third column to search for that word and grammatical form; click on the total to search for the root ὀπίσω.