عظيم when it comes with things it means some thing is huge EX وادي عظيم it means grand valley when it comes with people EX رجل عظيم it means this man makes good things to help people ,like (great man)

3azim: is a colloquial word. It's used in the spoken and informal language.. The Classical word( which means "Great") is" 3adheem = عظيم

It means great.

AAzim ( عزم ) means determination or Azeem ( عظيم ) this word has two meanings 1- great , mighty 2- amazing ( as Ammar said above )

معناها عظيم أو مدهش mean Amazing