GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Afterthought (), n.
   1. Reflection after an act; later or subsequent thought.
   
   [1913 Webster]
   
   
   2. an action taken after another action and related to the first action, which would normally or optimally be done along with the first action; -- as, “to do something as an afterthought”.
   
   [PJC]
   
   
   3. a feature or part added to a device, not thought of in its original design.
   
   [PJC]