The word ‘Man’ derives from a root [as in the Sanskrit Manush, Manas] that says: ‘That which has Mind’ or more literally, ‘That which thinks’.
How is ‘Man’ different say, from a Mattress? Man is different because Man alone has Mind. This has been the traditional answer since antiquity.
The defining attribute of Man is his Mind. And with this Mind, Man constructs his World as Model. And its central character is his model of himself as ‘Man’.
Homer’s Odyssey begins with the word ‘Man’ [Andra, from the Attic-Greek Aner, as in the English Anthropo].
Let’s go see if we can find the fella.