"解释单词的意思" 用英语表达为 "define the meaning of a word"。
"define" 是 "确定、规定" 的意思，源自拉丁语 "definire"，意为 "限定、规定"。
"meaning" 是 "意思、含义" 的意思，源自古英语 "mǣnan"，意为 "表示、意图"。
例句：
Can you define the meaning of the word "ambivalent"? (你能解释一下 "ambivalent" 这个词的意思吗？)
The dictionary defines the meaning of the word as "having mixed feepngs or contradictory ideas about something or someone." (字典上解释这个词的意思是 "对某事物或某人有矛盾的感觉或观点。")