Knight-errantry \Knight"-er`rant*ry\, n.; pl.
{Knight-errantries}.
The character or actions of wandering knights; the practice
of wandering in quest of adventures; chivalry; a quixotic or
romantic adventure or scheme.
[1913 Webster]
The rigid guardian [i. e., conscience] of a blameless
heart
Is weak with rank knight-erratries o'errun. --Young.
[1913 Webster]