Breadcrumb Home > Dictionary > Index S slow burn: Meaning and Definition of Find definitions for: slow' burn' Pronunciation: [key] — Informal. Informal. a gradual building up of anger, as opposed to an immediate outburst: I did a slow burn as the conversation progressed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. slow slowcoach ✖ Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language