Webster's Revised Unabridged Dictionary · 1913

Trenchmore

Trenchmore , noun

A kind of lively dance of a rude, boisterous character. Also, music in triple time appropriate to the dance. [Obsolete]
All the windows in the town dance new trenchmore. — Beau. & Fl

Trenchmore , intransitive verb

To dance the trenchmore. [Obsolete] — Marston