Define jeopardy . jeopardy synonyms, jeopardy pronunciation, jeopardy translation, English dictionary definition of jeopardy . n. pl. jeop·ard·ies 1. Risk of loss or injury; peril or danger. 2. Law A defendant's risk or danger of conviction when put on trial. American Heritage®... MnemonicDictionary.com - Meaning of jeopardy and a memory aid (called Mnemonic) to retain that meaning for long time in our memory. Lose for the second time in a row and his career as a top-class boxer is in serious jeopardy , but win and the possibilities are endless. Jeopardy means being in danger of being damaged or destroyed. Learn how to use this word in different contexts and see synonyms, translations and related words.