alarmed, a.
Fitted or protected with a (burglar, fire, etc.) alarm or alarms. Chiefly predicate.
1969 V. CANNING Queen's Pawn vi. 83 - Windows in the far wall overlooking a small yard and garden, each window alarmed and burglar proof.
1976 Liverpool Daily Post 11 Dec. (Advt.), - Warehouse to let, suitable for wholesale or light industrial use, alarmed.
1982 Amer. Speech LVII. 197 - This door is locked and alarmed between 11 p.m. and 6 a.m.
1985 Oxford Times 13 Sept. 4 - They even ripped off the front of the club bar, believing it to be alarmed, to gain access to cash, spirits and cigarettes.