1A wildfire on a prairie. Frequently in similative use, especially as the type of something that spreads uncontrollably.
2Figurative. Something which spreads or develops rapidly or uncontrollably.
Early 19th century. From prairie + fire.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。