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lockfast

Lockfast is a Scottish English adjective meaning fastened or secured with a lock — something that is physically locked and not meant to be opened without the right key.

ˈlɑkfəst195 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

Lockfast is a Scottish English adjective meaning fastened or secured with a lock — something that is physically locked and not meant to be opened without the right key. It sounds simple but it's a legally meaningful term in Scottish law, particularly in the context of theft and housebreaking, where 'opening a lockfast place' is a specific criminal charge. Beyond the legal context, it's used practically to describe anything that's been properly locked up and secured — a lockfast shed, a lockfast cabinet, a lockfast vehicle.

The police noted that the storage unit was lockfast but the padlock had been cut clean through.
Origin: Scottish compound: 'lock' + 'fast' (in the older sense of 'firmly fixed, secure'), similar to 'hold fast' or 'stuck fast.' The combination means secured firmly with a lock. Editorial expansion authored on Slangora (model-assisted, hedged).
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#2·Apr 27, 2026

(Scottish) Fastened or secured with a lock.

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