1. the conduct, behavior, or adventures of a knight-errant; the practice of wandering in search of adventure or to right wrongs
Usage: often used in historical or literary contexts; archaic or literary
2. behavior or conduct that is eccentric, misguided, or strays from accepted norms
Usage: figurative use

Examples

• The knight's errantry took him across many lands in search of noble deeds.
• Medieval literature is filled with tales of errantry and chivalrous adventure.
• His youthful errantry eventually gave way to a more settled life.
• The novel satirizes the romantic ideals of errantry through its bumbling protagonist.
• Her errantry from the family business disappointed her conservative relatives.