Detailed meaning of precarious When we refer to a situation, position, or condition as precarious , we are emphasizing its vulnerability and the potential for it to become problematic or dangerous due to its instability. Precarious circumstances often require careful handling, as they are tenuous and easily subject to change or disruption. Discover the term ' precarious ,' its origins, related terms, synonyms, antonyms, and how to use it effectively in writing and everyday conversation. Definition of precarious adjective in Oxford Advanced Learner's Dictionary. Meaning , pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Precarious means in danger because not firmly fixed or likely to fall or suffer harm. Learn how to use this adjective in sentences and see synonyms, antonyms and related words.