Cage

(Heb. kelub', Jeremiah 5:27, marg. "coop;" rendered "basket" in Amos 8:1), a basket of wicker-work in which birds were placed after being caught. In Revelation 18:2 it is the rendering of the Greek Phulake , properly a prison or place of confinement.

Source: Easton's Bible Dictionary
Cage

CAGE, v.t. To confine in a cage; to shut up, or confine.

Source: King James Dictionary
Cage

The term so rendered in (Jeremiah 5:27) is more properly a trap in which decoy birds were placed. In (Revelation 18:2) the (Greek term means a prison.

Source: Smith's Bible Dictionary