You might find this interesting: https://www.nyu.edu/gsas/dept/philo/courses/concepts/clark.html

Andy Clark and David Chalmers, The Extended Mind.

1. INTRODUCTION

Where does the mind stop and the rest of the world begin? The question invites two standard replies. Some accept the demarcations of skin and skull, and say that what is outside the body is outside the mind. Others are impressed by arguments suggesting that the meaning of our words "just ain't in the head", and hold that this externalism about meaning carries over into an externalism about mind. We propose to pursue a third position. We advocate a very different sort of externalism: an active externalism, based on the active role of the environment in driving cognitive processes.

Hi Daniel,

You said you wanted to define the mind by establishing its properties, but also that you are unclear what the mind is. A funny thing about definitions is, you can only know if the definition is correct if you already know the defining properties of the thing you're trying to define. So I wonder whether the approach you're taking is productive? What do you really want to know?