Breadcrumb Home > Dictionary > Index S seat belt: Meaning and Definition of Find definitions for: seat' belt" Pronunciation: [key] a belt or strap in an automobile, airplane, etc., fastened around or sometimes diagonally across the midsection to keep the person safely secured, as during a sudden stop. Also calledCf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: seatbelt (Thesaurus) sea tangle seater TrendingHere are the facts and trivia that people are buzzing about. Star Trek: First Contact Current Events This Week: September 2023 Countries with the Highest Literacy Rates 50 Funniest "Futurama" Quotes Dangerous Animals: Scorpions, Bears, and Poison-Dart Tree Frogs State Capitals and Largest Cities (& Some Common Questions) ✖ Related Content Daily Word Quiz: camenae Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language