adj.
  - relating to a large company or group. 
▸Law  (of a large company or group) authorized to act as a single entity and recognized as such in law.
 - of or shared by all the members of a group.
 
n.
 a corporate company or group.
 
  Derivative
  
  Etymology
  C15: from L. corporat-, corporare ‘form into a body’, from corpus, corpor- ‘body’.