society > authority > subjection > restraint or restraining > restraint depriving of liberty > confinement > [adverb] > closely (of confinement) (4)
Closely, tightly, strictly. Obsolete.
With reference to confinement or custody, watch or guard, a siege, etc.: Closely, narrowly, rigorously, vigilantly.
In close proximity. Near to some person or thing specified or understood. Hence with hold, keep, etc., sometimes implying restraint (see quots. 1656…
in a way that cramps or restricts free action.