ラウンドアップMeanings1nounRoundup; glyphosate herbicideRefers specifically to the Monsanto (now Bayer) brand of glyphosate-based herbicide. Used in agricultural and gardening contexts.庭にわの雑ざっ草そうを枯からすためにラウンドアップを使つかった。I used Roundup to kill the weeds in the garden.