Origin: Latin suffix -ance
Allegiance has 3 different meanings across 1 category:
the act of binding yourself (intellectually or emotionally) to a course of action
"his long commitment to public service"
"they felt no loyalty to a losing team"
the loyalty that citizens owe to their country (or subjects to their sovereign)
"When the king declared war, every soldier swore an oath of allegiance to protect his realm from invaders."
Loyalty to some cause, nation or ruler.
"After years of serving under his command, the general declared his final allegiance to the new king upon taking the oath of office."