
Historically, duelling was combat undertaken between two participants, often over matters of honour and fought with sharp blades, sometimes to the death although often to first blood or other agreed method. The DDS uses the term to refer to its ultimate expression of fencing practice. A duel in the DDS is undertaken between two members with rebated weapons to an agreed number of hits, judged by the two members' seconds. We see this not as a sporting encounter but as the ultimate expression of our art. The DDS also uses duels to judge advancement to Approved and Full Member status.
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Found on
http://www.encyclo.co.uk/visitor-contributions.php

The fighting of two persons, one against the other, at an appointed time and place, upon a precedent quarrel. It differs from an array in this, that the latter occurs on a sudden quarrel, while the former is always the result of design.
Found on
http://www.lectlaw.com/def/d205.htm
No exact match found.