To filibuster in the context of the U.S. Senate means to extend debate on a piece of legislation to delay or prevent a vote. Senators may speak at length on various topics, effectively using time to stall proceedings. The filibuster is a strategic tool employed by the minority party or individual Senators to influence legislation without a majority. This practice highlights the intricate rules of the Senate and the importance of procedural tactics in the legislative process, inviting ongoing debates about its implications for democratic governance.