SPAD

English Wikipedia has an article on:

signal passed at danger

Wikipedia

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• (deprecated use of |lang= parameter) Rhymes: -æd

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1. (deprecated template usage) (rail transport, UK) signal passed at danger

SPAD (plural SPADs)

1. (deprecated template usage) (rail transport, UK) an instance of a signal passed at danger

SPAD (third-person singular simple present SPADs, present participle SPADing, simple past and past participle SPADed)

1. (deprecated template usage) (rail transport, UK) to pass a signal at danger

• daps, pads, PDAs