/
ˈkɒ(g)nɪz(ə)ns/
n.
  - formal knowledge or awareness. 
▸Law  the action of taking judicial notice.
 - Heraldry  a distinctive device or mark, especially as formerly worn by retainers of a noble house.
 
Phrase
- take cognizance of
 formal attend to; take account of. 
Derivative
- cognizant adj.
  - cognize
 or cognise v. 
Etymology
ME conisance, from OFr. conoisance, based on L. cognoscere ‘get to know’.