man lock

noun

1. an air lock serving as a decompression chamber for workers.

man lock

noun

1. civil engineering an airlock that allows workmen to pass in and out of spaces with differing air pressures, esp one providing access to and from a tunnel, shaft, or caisson in which the air is compressed

Example Sentences

I saw the man lock the gate again, and he looked round him like a man afraid of being spied upon.

From Project Gutenberg

Side by side, on the level of the lower or working platform of the tunnel, were the man lock and the muck lock.

From Project Gutenberg