Late 17th century; earliest use found in Matthew Poole (?1624–1679), biblical commentator. Apparently from premeditating (although this is first attested slightly later) + -ly.
英语词典包含243303条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。