| 释义 |
exfiltration rare—1.|ˌɛksfɪlˈtreɪʃən|
[n. of action f. ex- prefix1 + filter: see -ation.]
The action or process of filtering out.
1878Lawrence tr. Cotta's Rocks Class. 25 Zeolites ‘are products of exfiltration or of the internal decomposition and transmutation of the mother rock.’
Restrict rare—1 to sense in Dict. and add: 2. The action of exfiltrating; withdrawal from a dangerous position. Also transf. Mil. (orig. U.S.).
1968Dict. U.S. Mil. Terms (U.S. Dept. Defense) 84/1 Exfiltration,..the removal of personnel or units from areas under enemy control. 1984Defense & Foreign Affairs Sept. 27/1 The Combat Talon and the HH-53 Pave Low are used in long-range infiltration, exfiltration, and rescue operations. 1987Christian Science Monitor 11 Mar. 11/3 He has begun to discern a new ‘exfiltration’ of young blacks to neighbouring states, similar to the flight after 1976. |