What is the meaning of 身?

a body; :

1. the main part of something
   1. the blade of a sword
   2. meat, flesh
   3. wood
2. oneself
3. one's position, one's social standing, one's circumstances

the main part of something

1. the blade of a sword
2. meat, flesh
3. wood

the blade of a sword

meat, flesh

wood

oneself

one's position, one's social standing, one's circumstances

a body

a living body

躯, 骸: a dead body, a corpse

a rotten tree trunk

a body

Source: wiktionary.org