[+ obj] formal : to put (something or someone) in a dangerous situation : endanger
▪ The toxic fumes imperiled the lives of the trapped miners. ▪ The financial health of the company was imperiled by a string of bad investments. ▪ a list of imperiled species
▪ The toxic fumes imperiled the lives of the trapped miners. ▪ The financial health of the company was imperiled by a string of bad investments. ▪ a list of imperiled species





