1. People who engage in unauthorized military expeditions into foreign countries to foment revolution or seize territory.
Usage: historical; plural form
2. Members of a legislative body who obstruct proceedings through prolonged speeches or other delaying tactics.
Usage: political; plural form

Examples

• The filibusterers of the 19th century attempted to invade Cuba and Nicaragua.
• American filibusterers were often motivated by expansionist ideals.
• Senate filibusterers used lengthy speeches to block the passage of civil rights legislation.
• The filibusterers delayed the vote by speaking for hours on unrelated topics.
• Historical accounts describe filibusterers as both adventurers and troublemakers.
• Modern filibusterers in Congress employ various parliamentary procedures to stall bills.