olemus
kontekstist sõltuv tõkestus

Wiktionary:
2. the action of installing a lock to keep someone out of an area, such as eviction of a tenant by changing the lock
3. (by extension) the exclusion of others from a certain place or situation
4. (computing) a situation where the system is not responding to input
5. a safety device designed to prevent touching a moving part when it is under operation

näiteid
https://en.wikipedia.org/wiki/Lockout%E2%80%93tagout

https://en.wikipedia.org/wiki/Regional_lockout

https://en.wikipedia.org/wiki/Lockout_chip