a person who secretly collects and reports information on the activities, movements, and plans of an enemy or competitor
间谍。
a person who keeps watch on others secretly
密探,暗探
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[as modifier]
a spy camera .间谍相机。
work for a government or other organization by secretly collecting information about enemies or competitors
当间谍,从事间谍活动
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he agreed to spy for the West .他同意作西方国家的间谍。
(
暗中监视,暗中观察
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the couple were spied on by reporters .这对夫妇受到记者盯梢。
[with obj.]discern or make out, especially by careful observation
认出;看出
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he could spy a figure in the distance .他能看出远处有人影。
[with obj.](
侦察出;探明,查明
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he would go and spy out the land .他将去探明地形。
"Middle English: shortening of Old French