Source : Webster's Revised Unabridged Dictionary (1913)

Trenchmore \Trench"more\, n.
   A kind of lively dance of a rude, boisterous character. Also,
   music in triple time appropriate to the dance. [Obs.]

         All the windows in the town dance new trenchmore.
                                                  --Beau. & Fl.

Trenchmore \Trench"more\, v. i.
   To dance the trenchmore. [Obs.] --Marston.