To herd (grazing animals) into pasturable land.放牧：把（草食动物）赶到作牧场的土地上去放牧&I{Informal} To retire or compel to retire from work or a full workload.【非正式用语】 退休，离休：从工作或满工作量中退下或迫使退下
柯林斯高阶英汉双解学习词典释义
N-VAR
牧场；牧草地
Pasture is land with grass growing on it for farm animals to eat.
If someone leaves for greener pastures, or in British English pastures new, they leave their job, their home, or the situation they are in for something they think will be much better.
If you put animals out to pasture, you move them out into the fields so they can eat the grass.
PHRASE
让…退休；使赋闲
If you say that someone is being put out to pasture, you mean they are no longer being employed because they are considered to be too old or no longer useful.