cage, hold, (im-)prison(-ment), ward, watch

Boyd’s Bible Dictionary:

(hollow). Bird-trap (Jer. 5:27); prison (Rev. 18:2).

Concise Bible Dictionary:

It is said symbolically that as a cage or trap is full of birds, so the houses of the Jews were full of deceit (Jer. 5:27). “A cage of every unclean and hateful bird,” is a character a mystical Babylon (Rev. 18:2). The word here is θυλακή, often translated “prison.”

Strong’s Dictionary of Greek Words:

Greek:
φυλακή
Transliteration:
phulake
Phonic:
foo-lak-ay’
Meaning:
from 5442; a guarding or (concretely, guard), the act, the person; figuratively, the place, the condition, or (specially), the time (as a division of day or night), literally or figuratively
KJV Usage:
cage, hold, (im-)prison(-ment), ward, watch