Emily Dickinson Lexicon

ER'RANT, a. [Fr. errant; L. errans, from erro, to err.]

1. Wandering; roving; rambling; applied particularly to knights, who, in the middle ages, wandered about to seek adventures and display their heroism and generosity, called knights errant.
2. Deviating from a certain course. Shak.
3. Itinerant. [Obs.]