/ˈɪnfɪltreɪt ||; ɪnˈfɪltret/verb [T] to enter an organization, etc secretly so that you can find out what it is doing 渗透，渗入（组织等）: The police managed to infiltrate the gang of terrorists. 警察成功地渗入这个恐怖组织。 ➔infiltration /-eɪʃn ||; -eʃən/ noun [C,U] ➔infiltrator noun [C]