Definitions:

1. 'Q.E.D.' stands for the Latin phrase 'Quad Erat Demonstrandum', which translates to 'That Which Was To Be Demonstrated'. NOUN
   • After laying out each step of the proof with precise reasoning and arriving at the established theorem, the mathematician triumphantly wrote 'Q.E.D.' at the bottom of the chalkboard.
2. A term used at the end of a mathematical proof or a logical argument to indicate that the proof or argument as been successfully completed and that what was set out to be proven has been proved. NOUN
3. Q.E.D. can also stand for quantum electrodynamics. NOUN

Synonyms:

• quantum electrodynamics