a. The obstructing or delaying of legislative action, especially by prolonged speechmaking.
b. An instance of this, especially a prolonged speech.
2. An adventurer who engages in a private military action in a foreign country.
v. fil·i·bus·tered, fil·i·bus·ter·ing, fil·i·bus·ters
1. To obstruct or delay legislative action, especially by making prolonged speeches.
2. To take part in a private military action in a foreign country.
To use a filibuster against (a legislative measure, for example).
[From Spanish filibustero, freebooter, from French flibustier, from Dutch vrijbuiter, pirate; see FREEBOOTER.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
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