Breadcrumb Home > Dictionary > Index L lock-in: Meaning and Definition of Find definitions for: lock-in Pronunciation: (lok'in"), [key] — n. an act or instance of becoming unalterable, unmovable, or rigid. commitment, binding, or restriction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lock-in (Thesaurus) Lockhart locking piece TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: ailurophobia Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language