Pro Se Legal Definition: Latin: on one’s own behalf. To appear for one's self in legal proceedings and in Court (at trial) without a lawyer. To be self-represented; direct personal conduct of litigation, as in a pro se litigant. REFERENCES: Duhaime, Lloyd, Legal Definition of Sixth Amendment Duhaime, Lloyd, Legal Definition of Pro Socio. Faretta v California 422 US 806 (1975) Categories & Topics: Dictionary of Latin Law Terms Duhaime's Civil Litigation & Evidence Law Dictionary Unless otherwise noted, this page was written by Lloyd Duhaime of Duhaime.org Always looking up definitions? Save time with our search provider (modern browsers only) If you find an error or omission in Duhaime's Law Dictionary, or if you have suggestion for a legal term, we'd love to hear from you!