the confining of prisoners to their cells, as following a riot or other disturbance.
a security measure taken during an emergency to prevent people from leaving or entering a building:
The school remains under lockdown due to police activity in the area.
(US) a security measure in which those inside a building such as a prison, school, or hospital are required to remain confined in it for a time: many schools remained under lockdown yesterday
the state of being grounded and denied privileges
also lock-down, from 1940s in various mechanical senses, from lock (v.) + down (adv.). Prison sense is by 1975, American English.
- Local anesthesia
local anesthesia n. Regional anesthesia produced by direct infiltration of local anesthetic solution into the surgical site. Also called infiltration anesthesia.
- Local anaphylaxis
local anaphylaxis n. The immediate, temporary, localized anaphylactic response of a sensitized individual following injection of an antigen into the skin.
- Local anaesthetic
noun 1. (med) a drug that produces local anaesthesia Often shortened to local See anaesthesia (sense 2)
[loh-kal, -kal] /ˈloʊˈkæl, -ˌkæl/ adjective 1. .