Covert activities or situations are secret or hidden.
例句
They have been supplying covert military aid to the rebels...他们一直在暗地里向叛乱者提供军事支援。The depth of covert racism in my own profession frightens me.我所从事的职业中暗藏着如此深的种族主义偏见,这让我感到害怕。
N-COUNT
(小动物或猎禽可藏身的)矮树丛,灌木丛
A covert is a group of small trees or bushes very close to each other where small animals or game birds can hide.
英汉词典释义
adj.
隐蔽的;不公开的;秘密的
We should learn to fight with enemy in an overt and covert way.我们应学会同敌人做公开和隐蔽的斗争。The army carried out covert surveillance of the building for several months.军队对这座建筑物进行了数月的秘密监视。
英英词典释义
Noun
1. a flock of coots
2. a covering that serves to conceal or shelter something;
"they crouched behind the screen""under cover of darkness"
Adjective
1. secret or hidden; not openly practiced or engaged in or shown or avowed;
"covert actions by the CIA""covert funding for the rebels"