n.; pl.Knight-errants, or Knights-errant. A wandering knight; a knight who traveled in search of adventures, for the purpose of exhibiting military skill, prowess, and generosity. [ 1913 Webster ]
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 ]