a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence)
an obstruction that stands in the way (and must be removed or surmounted or circumvented)
something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"
attracting and holding interest as if by a spell; "read the bedtime story in a hypnotic voice"; "she had a warm mesmeric charm"; "the sheer force of his presence was mesmerizing"; "a spellbinding description of life in ancient Rome"
a former instrument of punishment consisting of a heavy timber frame with holes in which the feet (and sometimes the hands) of an offender could be locked
a frame for constraining an animal while it is receiving veterinary attention or while being shod
a frame that supports a boat while it is under construction