"Secure confinement" refers to keeping someone or something safely and securely enclosed or restricted, usually to protect others or prevent harm.
Full definition
The cat needs to stay
in secure confinement for the first 2 - 3 weeks so that it becomes familiar with and identifies with its new location.
After a short stay
in secure confinement, the cats will accept their new home and be chasing mice out of your grain with enthusiasm!
Ideally, a Catahoula should have proper obedience training,
secure confinement on the owner's property, and an outlet for its energy.
Staffords can be escape artists, and many have been known to tunnel under or climb over fences, or even — yes — barrel right through the
less secure confinements.
Man in the pluralistic society is released from
this secure confinement into the exhilarating but frightening responsibility of freedom.
• New limits on the amount of time youth can be kept in juvenile detention or
secure confinement; and