GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Q.E.D, QED (kūˈē‑dēˈ), interj. [From Latin, quod erat demonstrandum, i.e. which was demonstrated.] Which was demonstrated; -- a phrase used after the conclusion of some line of reasoning, especially in mathematical or logical proofs. [abbrev.]
   
   [PJC]