base 1base n. 基礎, 基盤, 基部, 根拠; 基地; つけ根; 主成分, ベース; 底辺; 基数; 〔野球〕 塁. 【動詞+】 The troops abandoned their base. 部隊は基地を放棄した change one's base 転進する, 退却する clear the bases with a home run 〔野球〕 ホ
base on ~に基づく、~に準拠する Well, what are you basing this on? I would like to know what they're basing their information on. On what are you basing your information? What are you basing your assumptions on?