1) behold, see
Part of Speech: particle
Second person singular imperative active of G1492; used as interjection to denote surprise; lo!: - behold, lo, see.
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 ἴδε; click on the second column to search for that grammatical form of the root ἴδε; click on the third column to search for that word and grammatical form; click on the total to search for the root ἴδε.