1. a small organized dissenting group within a larger one, especially in politics
2. disagreement and conflict within a group

Examples

• A conservative faction within the party opposed the new policy.
• The rebel faction seized control of the capital city.
• Internal faction threatened to split the organization apart.
• She belonged to the moderate faction of the movement.
• The committee was divided by bitter faction over the budget.
• Different factions emerged after the leader’s resignation.
• Political faction made it difficult to pass legislation.