n.
    - an instance of buying or selling. 
▸the action of conducting business.
 - an exchange or interaction between people.
 - 
(transactions)
 published reports of proceedings at the meetings of a learned society.
 - an input message to a computer system dealt with as a single unit of work.
 
 
  Derivative
  
    - transact v.
  - transactional adj.
  - transactionally adv.
  - transactor n.
 
   
  Etymology
  ME (as a term in Roman Law): from late L. transactio(n-), from transigere ‘drive through’.