Breadcrumb Home > Dictionary > Index E expansion bolt: Meaning and Definition of Find definitions for: expan'sion bolt" Pronunciation: [key] — Building Trades. Building Trades. a bolt inserted into a hole drilled in masonry and mechanically expanded to serve as an anchor for shelves, timbers, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. expansion bit expansion card TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: prescient Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language