Full record for lock n.

Definition = airlock
OED requirements antedating 1928
Earliest cite in E. E. 'Doc' Smith's Skylark of Space
Comment OED includes this in its existing entry, which does not separate out the SF sense. The earliest SF example (in OED) is from 1959.
Last modified 6 July, 2008

Citations for lock n.

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1995 Dean Wesley Smith & Kristine Kathryn Rusch Star Trek Voyager: Escape x. 113, I want transporter locks at all times on the away team. If anything so much as moves down there, I want all of them back on board.
1995 Dean Wesley Smith & Kristine Kathryn Rusch Star Trek Voyager: Escape viii. 81 ‘Mr. Tuvok,’ she said, ‘I want you to maintain a lock on that humanoid. I want to know each time he takes a breath. Mr. Paris, I want you to scan for any anomalies in the area. Chakotay, see if you can find our away team underground, aboveground, or floating in the atmosphere. I want answers, people.’